Price to Wallace Road Trip: Epic Utah to Idaho Drive

The drive from Price, Utah to Wallace, Idaho covers 684 miles via I-15 N and I-84 W, typically taking 10 hours and 45 minutes without stops. This route crosses the Continental Divide at Monida Pass (elevation 6,870 ft) on the Montana-Idaho border, a spot where waters flow to both the Pacific and Atlantic oceans. It's a journey through the Intermountain West's vast sagebrush plains, volcanic badlands, and pine-clad mountains.

This road trip is family-friendly, with plenty of kid-friendly stops like the Museum of Clean in Pocatello and the Walk of Fame in Wallace. For pets, most rest areas have designated pet areas, and many hotels along the route are pet-friendly. However, be aware that temperatures can range from blistering summer heat (100°F) in Utah/Idaho deserts to freezing winter temps, so plan accordingly.

Fatigue Management & Rest Zones

• Take breaks every 2 hours; major rest stops are at Beaver, UT; McCammon, ID; and Missoula, MT (slightly off route).
• Top up on caffeine at truck stops—most are open 24/7.
• If drowsy, pull into a well-lit area like Flying J travel centers.

Hidden Off-Route Spots

Detour 10 miles south of Arco to the ghost town of Bech-Tog, a former mining town with eerie ruins. Also, near Malad City, Idaho, visit the hot pools at Maple Grove Hot Springs, a local favorite.

Consider checking out how to find the best stops and hidden gems between cities for more tips.

The landscape shifts from the red-rock canyons of the San Rafael Swell near Price to the Great Salt Lake desert, then into the volcanic plains of the Snake River Plain, and finally the forested slopes of the Bitterroot Mountains near Wallace. This is a route of striking contrasts.

Natural Landscapes & Attractions

• San Rafael Swell is a 2,000-square-mile geological feature known for its dramatic folds and petroglyphs.
• The lava fields at Craters of the Moon National Monument, near Arco, offer surreal basalt flows.
• Shoshone Falls, east of Twin Falls, plunges 212 feet—higher than Niagara.

Local Commerce & Culture

Wallace, Idaho, was a silver-mining boomtown with a population of 1,800; its historic district is listed on the National Register. The area's economy has shifted to tourism, with attractions like the Sierra Silver Mine Tour. Along the way, small towns like Arco, Idaho, are home to local diners serving hearty fare.

For a true local experience, visit the Moonlight Diner in Arco, known for its homemade pies. The town also claims to be the first in the world to be lit by nuclear power (1955).

Most of the route is interstate or four-lane highway, with the exception of the final stretch from Coeur d'Alene to Wallace on I-90 and State Highway 4, which is twisty and narrow. Fuel prices tend to decrease as you leave Utah and enter Idaho, so plan to fill up in Idaho Falls or Butte.

Fuel and Route Economics

• Average gas price in Utah: $3.50/gallon; in Idaho: $3.20/gallon.
• Estimated fuel cost for a standard sedan (30 mpg) is about $75.
• Consider fueling in Idaho Falls, where prices are typically the lowest.

Road Quality and Safety

Roads are generally well-maintained, but winter conditions can be treacherous, especially on Monida Pass. The route has reliable cell coverage except for a 30-mile stretch between Spencer, ID and Dubois, ID. Rest areas are available at major intervals, but they are basic; better options are truck stops.

Known for its safety record, the I-15 corridor has wide shoulders and clear signage. However, be cautious of wildlife crossings, especially at dawn and dusk.