Flagstaff to Fountain Hills Shuttle


Check Rates

Travelers leaving the pine‑covered streets of Flagstaff — home to Northern Arizona University, the historic downtown square, and the nearby Walnut Canyon — head south on Interstate 17. The highway drops from the high‑country ponderosa forest into the red‑rock corridors near Sedona, then threads through the Verde Valley past Camp Verde and Cordes Junction before opening onto the wide desert basin that surrounds the Phoenix metro area. The route covers roughly 110 miles as the crow flies, with a road distance a bit longer, and a typical door‑to‑door drive time between 149 and 205 minutes depending on traffic and weather.

Our private shuttle picks you up at any residence, hotel, or business in Flagstaff, including the Flagstaff Pulliam Airport area, and delivers you directly to your doorstep in Fountain Hills. Along the way you’ll pass the iconic McDowell Mountain Regional Park, the upscale neighborhoods of Eagle Mountain and Firerock, and the shimmering Fountain Hills fountain that gives the town its name. The service is designed for families, business groups, and solo riders who want a single vehicle for the entire journey without the hassle of coordinating multiple rides or navigating unfamiliar freeway exits. The Fountain Hills to Flagstaff page covers the same corridor in the opposite direction.

Because the I‑17 corridor can experience sudden congestion near the Phoenix‑area interchanges, our drivers monitor real‑time traffic and adjust departure times accordingly. If your flight into Phoenix Sky Harbor International Airport is delayed, we track the arrival and shift the pickup window so you’re not left waiting at the curb. Luggage space is generous enough for standard suitcases, ski gear, or golf bags, and the vehicle interior is kept clean and climate‑controlled for the full duration of the trip.

How long does the trip usually take?

Most rides fall between two and a half and three and a half hours, depending on the time of day and seasonal road conditions.

What happens if my flight is delayed?

We monitor incoming flights and will move the scheduled pickup to match the updated arrival time, so you’re met promptly without extra waiting charges.

Can I bring oversized items like skis or a bike?

Yes, the shuttle’s cargo area accommodates typical oversized luggage; just let us know when you book so we can confirm space.

Ready to reserve your private ride? Call (480) 710-3441 or book online and apply promo code ONLINE for 10 % off round‑trip bookings.

Flagstaff to Fountain Hills: Distance, Drive Time, and Route Overview

The drive from Flagstaff to Fountain Hills covers roughly 154 miles (about 247 kilometers) by car — a straight-line distance of just over 110 miles to the south, per distance-cities.com. In real driving terms, that means heading south on Interstate 17 from Flagstaff, continuing through the Verde Valley and the Black Canyon corridor toward the Phoenix metro area, then following state routes east and north into Fountain Hills. Non-stop, the trip takes about 2 hours and 25 minutes in normal traffic, according to distance-cities.com.

Because the route drops nearly a mile in elevation — Flagstaff sits at about 7,000 feet on the Colorado Plateau, while Fountain Hills sits at roughly 1,500 feet in the Sonoran Desert — you'll pass through several distinct climate zones, from ponderosa pine forest to high desert to saguaro-studded mountainsides. That elevation change is why the weather at each end can be dramatically different on the very same day.

Flagstaff to Fountain Hills at a Glance
DetailFigure
Driving distance154 miles (247.18 km) via I-17, per distance-cities.com
Straight-line distance110.22 miles, heading south
Non-stop drive timeAbout 2 hours 25 minutes
Estimated fuel cost$29.25 one way (estimate based on an average Arizona gas price of $4.74/gallon, per distance-cities.com)
Estimated CO2 per trip120.85 pounds for an average car
Carbon footprint per mile0.79 pounds of CO2 per mile
Closest town to the halfway pointSpring Valley, AZ

Best Driving Route: Step-by-Step Directions

The most direct published route (per distance-cities.com) follows I-17 and AZ 79. In practice, most travelers drive it like this:

Step 1: Leave Flagstaff on I-17 South

From downtown Flagstaff, pick up Interstate 17 south near the Northern Arizona University area. You'll climb out of the pine forest past Bellemont and the surrounding high country before the highway begins its long, winding descent down the Mogollon Rim — one of the most scenic stretches of interstate in Arizona.

Step 2: Descend Through the Verde Valley

The highway drops toward Camp Verde, a natural stopping point roughly midway through the northern half of the drive. Nearby attractions include Montezuma Castle National Monument and Out of Africa Wildlife Park, both popular detours if you're not in a hurry.

Step 3: Cross the Black Canyon Corridor

South of Camp Verde, I-17 threads through rugged terrain past Sunset Point and Black Canyon City before reaching the Phoenix metropolitan area. This is the stretch where the halfway point — Spring Valley, near the Cordes Junction area — sits.

Step 4: Head East and North Into Fountain Hills

From the I-17 corridor, connect east across the northeast Valley and follow the state route system — ultimately joining the Beeline Highway (SR 87) corridor that runs through the Fountain Hills area. Fountain Hills sits just east of Scottsdale and north of the Fort McDowell Yavapai Nation, framed by the McDowell Mountains.

Halfway Point Between Flagstaff and Fountain Hills

According to distance-cities.com, the exact halfway point is 76.79 miles from Flagstaff and the same from Fountain Hills, with a drive time of approximately 1 hour 12 minutes from each end. The closest town to that midpoint is Spring Valley, Arizona — about 82 miles from Flagstaff and 80 miles from Fountain Hills. It takes roughly 1 hour 12 minutes to reach Spring Valley from Flagstaff and 1 hour 18 minutes from Fountain Hills.

Spring Valley sits along the I-17 corridor in Yavapai County, near the Cordes Junction area. It's a sensible place to plan a fuel or stretch break, since it splits the trip almost perfectly in two.

Estimated Gas Cost and Emissions

Using an average Arizona gas price of $4.74 per gallon of regular, distance-cities.com estimates the cost of gas for this trip at $29.25 one way. Treat that as a ballpark figure only — fuel prices at Flagstaff stations, along the I-17 corridor, and in the Fountain Hills area can vary meaningfully from the statewide average, so check current prices before you go.

On emissions, an average car making this drive would release an estimated 120.85 pounds of CO2 into the atmosphere, working out to a carbon footprint of about 0.79 pounds of CO2 per mile. Sharing a ride — for example, booking a shared shuttle instead of driving solo — is one straightforward way to reduce your per-person footprint on this route.

Weather in Flagstaff and Fountain Hills

This is one of the few drives in Arizona where you can genuinely experience two seasons in a single trip. Flagstaff, at high elevation on the Colorado Plateau, gets cool summers, snowy winters, and occasional monsoon thunderstorms in July and August. Fountain Hills, down in the desert, runs far hotter — summer highs routinely climb well past 100°F, while winter days are typically mild and sunny.

Practical takeaway: in winter, check road conditions on I-17 before departing Flagstaff, since snow and ice are possible on the upper stretch near Bellemont and the Rim. In summer, leave early so most of your drive is done before the hottest part of the day, and carry extra water.

Recommended Stops Along the Way

  • Sunset Point rest area (I-17): A scenic overlook on the descent from the high country — one of the best photo stops on the whole route.
  • Camp Verde: Fuel, food, and easy access to Montezuma Castle National Monument, a well-preserved cliff dwelling.
  • Black Canyon City / Rock Springs: A classic roadside stop area on I-17 for a quick bite before the final run into the Valley.
  • Fountain Hills' Avenue of the Fountains: Once you arrive, the town's central park and fountain — one of the tallest fountains in the world when it runs — is the signature sight.
  • McDowell Mountain Regional Park: Just south of town, with hiking and biking trails against the McDowell Mountains.

Recommended Hotels in Fountain Hills, AZ

Fountain Hills is a compact, resort-oriented town northeast of Scottsdale. Accommodations cluster around the town's central fountain and golf courses, with additional options along the corridors toward the Fort McDowell area and the McDowell Mountains. Because inventory is smaller than in nearby Scottsdale, book ahead for winter-season weekends and major local events, when the town draws visitors for art festivals and its famous fountain and public art scene. If Fountain Hills lodging is full, the neighboring communities of Scottsdale, Carefree, and Cave Creek — a short drive away — are common fallbacks.

Rental Cars in Flagstaff, AZ

If you're starting in Flagstaff and want to drive yourself, rental agencies operate in and around the city, including at Flagstaff Pulliam Airport (FLG) and at downtown locations. Compare rates across airport and city branches — pricing differs by pickup location and season, and winter travel dates can see higher demand. Since the drive to Fountain Hills is about 154 miles each way, factor in mileage allowances and fuel when comparing deals, and remember the estimated $29.25 fuel cost (at the statewide average price noted above) is a one-way figure.

Driving vs. Shuttle: Which Is Smarter for This Route?

Driving yourself offers flexibility for detours like Montezuma Castle or Sunset Point. But a pre-booked shuttle has real advantages for this particular trip:

  • No winter mountain driving. The I-17 descent from Flagstaff can be challenging in snow and ice — a professional driver handles that stretch daily.
  • Door-to-door convenience. Fountain Hills is a residential resort town; a shuttle drops you at your hotel or rental home rather than leaving you to navigate unfamiliar desert roads at night.
  • Shared-ride savings and lower emissions. Splitting the 154-mile trip with other travelers can be cheaper than driving solo and reduces per-person CO2 on a route estimated at 120.85 pounds per average car.

Airport Shuttle of Phoenix provides scheduled and private transportation between Flagstaff and Phoenix-area destinations including Fountain Hills — see our related pages for Flagstaff to Phoenix, Phoenix Airport to Fountain Hills, and Flagstaff to Scottsdale.

Tips for a Smarter, Safer Trip

  • Check conditions before winter departures. Snow on the Flagstaff end and heat on the Fountain Hills end are the two main weather risks.
  • Plan a midpoint break at Spring Valley. The closest town to the halfway point, it splits the 2-hour-25-minute drive almost evenly.
  • Fuel up in Flagstaff or Camp Verde. Services thin out along parts of the I-17 corridor between the Rim and the Valley.
  • Watch for wildlife at dusk. Elk and deer are common near the high-country stretches; javelina and coyotes appear closer to Fountain Hills.
  • If your car breaks down en route, pull fully off the highway, stay with your vehicle, and call 911 or the Arizona Department of Public Safety — cell coverage is generally good along I-17 but can drop in canyons.

Frequently Asked Questions

How far is Fountain Hills from Flagstaff?

About 154 miles (247.18 kilometers) by car, following the I-17 and AZ 79 route per distance-cities.com. The straight-line distance is 110.22 miles to the south.

How long does the drive take?

Roughly 2 hours and 25 minutes non-stop in normal conditions. Add time for breaks, winter weather near Flagstaff, or Phoenix-area traffic on the southern end.

The halfway point is 76.79 miles from Flagstaff, and the closest town is Spring Valley, AZ — about 82 miles from Flagstaff and 80 miles from Fountain Hills, near the Cordes Junction area on I-17.

How much does gas cost for the trip?

An estimated $29.25 one way, based on an average Arizona price of $4.74 per gallon of regular (per distance-cities.com). Actual cost depends on your vehicle, current pump prices, and route variations.

What is the drive's carbon footprint?

An average car releases an estimated 120.85 pounds of CO2 on this route — about 0.79 pounds per mile. Shared shuttles reduce the per-person footprint by dividing that total among multiple travelers.

Which route is the most scenic?

The full I-17 route is scenic in its own right — especially the descent from the Mogollon Rim and the Sunset Point overlook. Travelers with extra time often detour near Camp Verde for Montezuma Castle National Monument.

Can I take a shuttle instead of driving?

Yes. Airport Shuttle of Phoenix offers service between Flagstaff and Phoenix-area destinations, including Fountain Hills. It's a popular choice in winter, when snow and ice can make the I-17 descent from Flagstaff difficult for unfamiliar drivers.

From Phoenix to Casa Grande

Click Above to Check Rates

Pricing / Fares

How much does it cost?

It depends on the addresses you enter and the number of people. Check rates by clicking any of the buttons above or below that say "Check Rates". There are different options under "Select Service" like "To Airport" or "From Airport" and "One Way" or "Round Trip". Choose the option called "Any Address" for non-airport transportation in between any two addresses in Arizona. Rates are total, not per person. Enter the promo code "ONLINE" for one way trips to save 10%, or book a round trip to save more both ways.

How do I get an accurate quote?

  • Step 1 - Just type in the city to check rates, but we recommend entering the full address to get an accurate quote since we have special rates for certain zip codes and most pricing is mileage based. Feel free to call us if you have any questions. Once you fill in the addresses, click "View Rates".
  • Step 2 - We include pricing for Taxi, Airport Shuttle and Black Car Service, so you can compare costs and have more options. Choose the type of service you want with the correct number of passengers. Once a price comes up and you're happy, click "Reserve Now"
  • Step 3 - It's always a good idea to enter your name, cell phone and email to save your quote and automatically get a copy sent to your email. That way we can easily look up your quote by name when you call and finish up your reservation when you're ready. Just click "Continue"
  • Step 4 - The website won't actually book anything until you enter a credit or debit card on the final booking screen. You will automatically receive a confirmation email with all the details after you click "Confirm My Reservation".

Check Rates


How do I save money?

Please enter the full address to get the most accurate rates between Phoenix and Casa Grande. Book a round trip and you'll receive 10% off each way. If it's a one way use promo code ONLINE to save 10%. This promo code is only valid on one way trips. If you're booking a round trip you automatically save 10% each way, so use discount code NONSTOP instead to receive a free upgrade to non-stop.

What are the benefits of using our service?

Door to door service is included on all our trips. Usually trips are non-stop in a nicer vehicle. We pick you up at your home anytime 24/7. We normally take you straight home, which is very different from other companies that leave you at a bus stop and stop and wait at intermediate points for hours. We also don't pack you in with 8-15 people you don't know and stop everywhere.

Does it cost anything to change my reservation?

You can always change the date and time of your reservation at no cost. If you don't know the exact address, you can enter the city for now to reserve it, and give us the full address later. If you don't know your flight number, you can estimate the time and update the flight number and time later via phone, email or text.

Check Rates


Our Better Vehicles

What type of vehicle will pick me up?

We send a airport shuttle (4+ passengers) or a nice car (1-3 passengers) anytime and take you to or from any address in Arizona, not just PHX. Our vehicles are clean and newer. Most vehicles are luxury and full size. We have Mercedes Sprinters, Lincoln Navigators, Chrysler 300's, Lexus ES300 Hybrids, Lincoln MKZ's, and a variety of other vehicles to meet your needs.


Our Pickup Locations

Your Casa Grande shuttle picks up where it says Prearranged. If you are in a wheelchair, do not allow your attendant to leave you anywhere except Prearranged. The signs are easy to see and they are always at the outer curb. Sometimes security will send people to the wrong place, so it's better to follow the directions below. PHX also won't allow drivers to walk more than 15 feet away from their vehicle or wait, so good communication is essential. Turn on your cell phone and take it off of airplane mode, so your driver can call or text you. If you don't recognize the number, it's probably your driver.


Terminal 3 Prearranged is across the crosswalk from Door 6 and to the right, south side of the building.


Terminal 4 Prearranged is across the crosswalk from Door 3, north side of the building, first floor. The sign says "Prearranged Vehicles 3 NORTH".


To and From Any Address (One Way)

What kind of transportation services do you offer?

We offer a shuttle Phoenix to Casa Grande, and a Casa Grande shuttle from Casa Grande to Phoenix, and other types of Casa Grande transportation like black car and taxi. We customize our airport shuttle service to your needs by offering different options like shuttles, black car services, and taxi. We offer many types of vehicles, and different options to make your experience great. Learn more by clicking here.

Check Rates

Flagstaff to Fountain Hills: Distance, Drive Time, and Route Overview

The drive from Flagstaff to Fountain Hills covers roughly 154 miles (about 247 kilometers) by car — a straight-line distance of just over 110 miles to the south, per distance-cities.com. In real driving terms, that means heading south on Interstate 17 from Flagstaff, continuing through the Verde Valley and the Black Canyon corridor toward the Phoenix metro area, then following state routes east and north into Fountain Hills. Non-stop, the trip takes about 2 hours and 25 minutes in normal traffic, according to distance-cities.com.

Because the route drops nearly a mile in elevation — Flagstaff sits at about 7,000 feet on the Colorado Plateau, while Fountain Hills sits at roughly 1,500 feet in the Sonoran Desert — you'll pass through several distinct climate zones, from ponderosa pine forest to high desert to saguaro-studded mountainsides. That elevation change is why the weather at each end can be dramatically different on the very same day.

Flagstaff to Fountain Hills at a Glance
DetailFigure
Driving distance154 miles (247.18 km) via I-17, per distance-cities.com
Straight-line distance110.22 miles, heading south
Non-stop drive timeAbout 2 hours 25 minutes
Estimated fuel cost$29.25 one way (estimate based on an average Arizona gas price of $4.74/gallon, per distance-cities.com)
Estimated CO2 per trip120.85 pounds for an average car
Carbon footprint per mile0.79 pounds of CO2 per mile
Closest town to the halfway pointSpring Valley, AZ

Best Driving Route: Step-by-Step Directions

The most direct published route (per distance-cities.com) follows I-17 and AZ 79. In practice, most travelers drive it like this:

Step 1: Leave Flagstaff on I-17 South

From downtown Flagstaff, pick up Interstate 17 south near the Northern Arizona University area. You'll climb out of the pine forest past Bellemont and the surrounding high country before the highway begins its long, winding descent down the Mogollon Rim — one of the most scenic stretches of interstate in Arizona.

Step 2: Descend Through the Verde Valley

The highway drops toward Camp Verde, a natural stopping point roughly midway through the northern half of the drive. Nearby attractions include Montezuma Castle National Monument and Out of Africa Wildlife Park, both popular detours if you're not in a hurry.

Step 3: Cross the Black Canyon Corridor

South of Camp Verde, I-17 threads through rugged terrain past Sunset Point and Black Canyon City before reaching the Phoenix metropolitan area. This is the stretch where the halfway point — Spring Valley, near the Cordes Junction area — sits.

Step 4: Head East and North Into Fountain Hills

From the I-17 corridor, connect east across the northeast Valley and follow the state route system — ultimately joining the Beeline Highway (SR 87) corridor that runs through the Fountain Hills area. Fountain Hills sits just east of Scottsdale and north of the Fort McDowell Yavapai Nation, framed by the McDowell Mountains.

Halfway Point Between Flagstaff and Fountain Hills

According to distance-cities.com, the exact halfway point is 76.79 miles from Flagstaff and the same from Fountain Hills, with a drive time of approximately 1 hour 12 minutes from each end. The closest town to that midpoint is Spring Valley, Arizona — about 82 miles from Flagstaff and 80 miles from Fountain Hills. It takes roughly 1 hour 12 minutes to reach Spring Valley from Flagstaff and 1 hour 18 minutes from Fountain Hills.

Spring Valley sits along the I-17 corridor in Yavapai County, near the Cordes Junction area. It's a sensible place to plan a fuel or stretch break, since it splits the trip almost perfectly in two.

Estimated Gas Cost and Emissions

Using an average Arizona gas price of $4.74 per gallon of regular, distance-cities.com estimates the cost of gas for this trip at $29.25 one way. Treat that as a ballpark figure only — fuel prices at Flagstaff stations, along the I-17 corridor, and in the Fountain Hills area can vary meaningfully from the statewide average, so check current prices before you go.

On emissions, an average car making this drive would release an estimated 120.85 pounds of CO2 into the atmosphere, working out to a carbon footprint of about 0.79 pounds of CO2 per mile. Sharing a ride — for example, booking a shared shuttle instead of driving solo — is one straightforward way to reduce your per-person footprint on this route.

Weather in Flagstaff and Fountain Hills

This is one of the few drives in Arizona where you can genuinely experience two seasons in a single trip. Flagstaff, at high elevation on the Colorado Plateau, gets cool summers, snowy winters, and occasional monsoon thunderstorms in July and August. Fountain Hills, down in the desert, runs far hotter — summer highs routinely climb well past 100°F, while winter days are typically mild and sunny.

Practical takeaway: in winter, check road conditions on I-17 before departing Flagstaff, since snow and ice are possible on the upper stretch near Bellemont and the Rim. In summer, leave early so most of your drive is done before the hottest part of the day, and carry extra water.

Recommended Stops Along the Way

  • Sunset Point rest area (I-17): A scenic overlook on the descent from the high country — one of the best photo stops on the whole route.
  • Camp Verde: Fuel, food, and easy access to Montezuma Castle National Monument, a well-preserved cliff dwelling.
  • Black Canyon City / Rock Springs: A classic roadside stop area on I-17 for a quick bite before the final run into the Valley.
  • Fountain Hills' Avenue of the Fountains: Once you arrive, the town's central park and fountain — one of the tallest fountains in the world when it runs — is the signature sight.
  • McDowell Mountain Regional Park: Just south of town, with hiking and biking trails against the McDowell Mountains.

Recommended Hotels in Fountain Hills, AZ

Fountain Hills is a compact, resort-oriented town northeast of Scottsdale. Accommodations cluster around the town's central fountain and golf courses, with additional options along the corridors toward the Fort McDowell area and the McDowell Mountains. Because inventory is smaller than in nearby Scottsdale, book ahead for winter-season weekends and major local events, when the town draws visitors for art festivals and its famous fountain and public art scene. If Fountain Hills lodging is full, the neighboring communities of Scottsdale, Carefree, and Cave Creek — a short drive away — are common fallbacks.

Rental Cars in Flagstaff, AZ

If you're starting in Flagstaff and want to drive yourself, rental agencies operate in and around the city, including at Flagstaff Pulliam Airport (FLG) and at downtown locations. Compare rates across airport and city branches — pricing differs by pickup location and season, and winter travel dates can see higher demand. Since the drive to Fountain Hills is about 154 miles each way, factor in mileage allowances and fuel when comparing deals, and remember the estimated $29.25 fuel cost (at the statewide average price noted above) is a one-way figure.

Driving vs. Shuttle: Which Is Smarter for This Route?

Driving yourself offers flexibility for detours like Montezuma Castle or Sunset Point. But a pre-booked shuttle has real advantages for this particular trip:

  • No winter mountain driving. The I-17 descent from Flagstaff can be challenging in snow and ice — a professional driver handles that stretch daily.
  • Door-to-door convenience. Fountain Hills is a residential resort town; a shuttle drops you at your hotel or rental home rather than leaving you to navigate unfamiliar desert roads at night.
  • Shared-ride savings and lower emissions. Splitting the 154-mile trip with other travelers can be cheaper than driving solo and reduces per-person CO2 on a route estimated at 120.85 pounds per average car.

Airport Shuttle of Phoenix provides scheduled and private transportation between Flagstaff and Phoenix-area destinations including Fountain Hills — see our related pages for Flagstaff to Phoenix, Phoenix Airport to Fountain Hills, and Flagstaff to Scottsdale.

Tips for a Smarter, Safer Trip

  • Check conditions before winter departures. Snow on the Flagstaff end and heat on the Fountain Hills end are the two main weather risks.
  • Plan a midpoint break at Spring Valley. The closest town to the halfway point, it splits the 2-hour-25-minute drive almost evenly.
  • Fuel up in Flagstaff or Camp Verde. Services thin out along parts of the I-17 corridor between the Rim and the Valley.
  • Watch for wildlife at dusk. Elk and deer are common near the high-country stretches; javelina and coyotes appear closer to Fountain Hills.
  • If your car breaks down en route, pull fully off the highway, stay with your vehicle, and call 911 or the Arizona Department of Public Safety — cell coverage is generally good along I-17 but can drop in canyons.

Frequently Asked Questions

How far is Fountain Hills from Flagstaff?

About 154 miles (247.18 kilometers) by car, following the I-17 and AZ 79 route per distance-cities.com. The straight-line distance is 110.22 miles to the south.

How long does the drive take?

Roughly 2 hours and 25 minutes non-stop in normal conditions. Add time for breaks, winter weather near Flagstaff, or Phoenix-area traffic on the southern end.

The halfway point is 76.79 miles from Flagstaff, and the closest town is Spring Valley, AZ — about 82 miles from Flagstaff and 80 miles from Fountain Hills, near the Cordes Junction area on I-17.

How much does gas cost for the trip?

An estimated $29.25 one way, based on an average Arizona price of $4.74 per gallon of regular (per distance-cities.com). Actual cost depends on your vehicle, current pump prices, and route variations.

What is the drive's carbon footprint?

An average car releases an estimated 120.85 pounds of CO2 on this route — about 0.79 pounds per mile. Shared shuttles reduce the per-person footprint by dividing that total among multiple travelers.

Which route is the most scenic?

The full I-17 route is scenic in its own right — especially the descent from the Mogollon Rim and the Sunset Point overlook. Travelers with extra time often detour near Camp Verde for Montezuma Castle National Monument.

Can I take a shuttle instead of driving?

Yes. Airport Shuttle of Phoenix offers service between Flagstaff and Phoenix-area destinations, including Fountain Hills. It's a popular choice in winter, when snow and ice can make the I-17 descent from Flagstaff difficult for unfamiliar drivers.