Afton to Dillon Drive: Scenic Route Guide

The drive from Afton, WY to Dillon, MT begins with a unique distinction: Afton is home to the world's largest elk antler arch, spanning US-89 at the town's entrance. This 75-foot-wide arch, built in 1954, uses over 3,000 antlers and sets the tone for a journey through the Salt River Range and beyond.

This route crosses the Idaho border into Montana, passing through the Caribou-Targhee National Forest and the Centennial Valley. Drivers should expect mountain passes and wide-open valleys.

The journey from Afton to Dillon involves a combination of US-89 north to Alpine, then US-26 east to Swan Valley, then US-191 north to West Yellowstone, and finally I-15 north to Dillon. Alternatively, a more direct path uses US-89 to Montpelier, ID, then US-30 to Soda Springs, and US-20 to Idaho Falls, then I-15 north. The latter is faster but less scenic.

• Watch for construction on US-89 near Alpine in summer; delays possible.
• Mobile coverage is sporadic in the mountains; download offline maps.
• Cell service resumes reliably in Idaho Falls and Dillon.

Fuel stations cluster in Alpine, Swan Valley, West Yellowstone, and Idaho Falls. Gas prices are higher in resort towns like West Yellowstone; fill up in Idaho Falls for the best rates. Dillon has several stations near I-15.

The route includes mountain passes like Teton Pass (elev. 8,431 ft) if taking the alternate via Jackson, but the main route stays lower. Winter driving can be treacherous; check road conditions. The Centennial Valley has no services for 50 miles, so plan fuel and rest stops.

For families, the Grizzly & Wolf Discovery Center in West Yellowstone is a hit. Pet-friendly stops include the Ashton Memorial Park in Idaho and Lionhead Rest Area near the Montana border. Rest areas are spaced every hour; the Idaho Falls rest stop is a good mid-point. Locals recommend the Sagebrush Cafe in Monida for a quick coffee break.

The route passes the Palisades Reservoir (Idaho) and the Caribou-Targhee National Forest, offering views of the Teton Range in the distance. Near West Yellowstone, you can detour to the Madison River for fishing. The Centennial Valley between Monida and Dillon is a remote grassland with wildlife like pronghorn.

Local commerce along the way includes family-run diners in Alpine and Swan Valley, plus the famous Buffalo Bar in West Yellowstone (est. 1925). In Dillon, the Beaverhead County Museum is a cultural stop. For those interested in how to find the best stops and hidden gems between cities, exploring side roads like the Gravelly Range Road can lead to ghost towns.