Idaho Falls to McCall: A Scenic Drive Through the Gem State

Did you know the route from Idaho Falls to McCall traverses the volcanic plains of the Eastern Snake River Plain before climbing into the granitic Idaho Batholith? This geologic transition is visible in the landscape as you drive west on US-20 and then north on ID-55, crossing over 100 miles of high desert and forest. The drive covers approximately 280 miles (451 km) and takes about 5 hours without stops. For tips on how to find the best stops and hidden gems between cities, check out how to find the best stops and hidden gems between cities.

The drive showcases three distinct eco-regions. From the sagebrush steppe of the Snake River Plain to the ponderosa pine forests of the Boise National Forest, the scenery transitions dramatically. Pay attention at mile marker 68 on US-20 for the Big Lost River volcanic craters. Near Fairfield, the Camas Prairie blooms with blue camas lilies in early June. McCall sits on Payette Lake, a glacial gem at 1530 meters elevation.

• Natural Attractions: Craters of the Moon National Monument (detour), Ponderosa State Park, Payette Lake.
• Local Commerce: Idaho Falls farmers market (Saturdays June–Sept), McCall art galleries, and local gem shops.

The route splits into two distinct legs: Idaho Falls to Arco (US-20 west), then Arco to McCall via ID-55. US-20 is a well-maintained four-lane highway; ID-55 is a two-lane road with occasional passing lanes. Traffic is generally light except near McCall during ski season.

• Fuel stops: Idaho Falls (multiple stations), Arco (limited options), Fairfield (one station), and Donnelly (McCall area).
• Road quality: US-20 is excellent; ID-55 is good but winding near McCall.
• Construction: Summer 2024 saw repairs on ID-55 near Cascade; check Idaho 511 for updates.

The major hazard on ID-55 is wildlife (deer, elk) at dawn/dusk. Maintain 55 mph on curves. For families, the Idaho Falls Zoo and the Discovery Center in Idaho Falls are excellent pre-drive activities. McCall offers the McCall Activity Barn (mini-golf, zipline). Pets are welcome at most pullouts and at Pepper Tree Ranch (dog-friendly patio).

• Safety: Carry extra water and snacks; cell service is spotty between Arco and Fairfield.
• Rest zones: Rest areas at mile 58 on US-20 and at the Payette Lake Scenic Overlook.
• Fatigue management: Stop every 2 hours; ideal stops include Arco (gas and food) and Cascade (picnic at Lake Cascade).