Driggs to Cascade Road Trip: Scenic Drive Idaho

Spanning 350 miles from the Teton Range to the Sawtooth Mountains, this route along US-20, US-26, and ID-55 passes through three national forests and the Camas Prairie. A little-known fact: the stretch between Arco and Cascade includes the longest unlit stretch of US-20 in Idaho, with no gas stations for 75 miles.

Driving time is about 6-7 hours without stops, but given the scenery, plan for a full day. The route gains over 2,000 feet in elevation, crossing the 6,860-foot Teton Pass before descending into Idaho's volcanic plains.

Fuel economy is critical: only five towns along the route have gas stations. Fill up in Driggs, Idaho Falls, Arco, Mackay, and Stanley. The most expensive gas is in Stanley; cheaper options exist in Arco.

• US-20 from Idaho Falls to Arco is straight, flat, and often windy.
• ID-75 to Stanley twists through the Sawtooth National Recreation Area; watch for wildlife at dawn and dusk.
• ID-55 from McCall to Cascade is hilly; winter requires traction tires.

Cell service: Verizon has spotty coverage from Arco to Stanley; AT&T is nearly absent. Download offline maps. For detailed stop planning, see how to find the best stops and hidden gems between cities.

Fatigue management: no rest stops between Arco and Stanley. Break at Craters of the Moon (picnic area) or at the Big Lost River rest area near Mackay. Keep a full tank and water.

• Family suitability: Craters of the Moon has a Junior Ranger program and paved loops. The Idaho Falls River Walk has a playground and splash pad.
• Pet-friendly: Most trailheads allow dogs on leash; hot springs are not dog-friendly. Pet-friendly lodging: Mountain Valley Lodge in Stanley.

Hidden off-route spot: Goldbug Hot Springs, near Salmon (50 min detour from Leadore). A 2-mile hike leads to natural pools with Sawtooth views.

Road quality: US-20 is well-maintained; ID-75 has potholes after winter. Watch for livestock on ID-55 near Cascade. Always carry a spare tire.

The route passes Craters of the Moon National Monument (UNESCO candidate), a vast lava field with over 60 fissure eruptions. Hike the Wilderness Trail or explore cave tubes. Entrance fee $20 per vehicle.

In Stanley, the Sawtooth National Recreation Area offers mountain peaks, alpine lakes, and hot springs. Try the Shirley-Sawtooth Loop trail (moderate, 4.5 miles).

Local commerce: Arco's Pickle's Place serves legendary huckleberry shakes. In Cascade, the Cattleman's Steakhouse is a classic. For handcrafted goods, visit Stanley's Old Town Gallery.

Climatic conditions: summer temps range from 70-85°F, but afternoons bring thunderstorms. Fall offers crisp air and golden aspen. Spring is snowy at passes until June.