The Ashton to Tetonia Trail follows a converted railroad corridor through some of eastern Idaho’s most stunning agricultural and mountain landscapes. Stretching roughly 30 miles between the small towns of Ashton and Tetonia in Fremont and Teton Counties, this rail-trail offers an unusually wide-open perspective on the western slope of the Teton Range — a view most visitors never see from the Wyoming side.

The trail surface is primarily packed gravel, making it accessible for hiking, mountain biking, horseback riding, and cross-country skiing in winter. The relatively flat grade — a hallmark of its railroad origins — means families and casual riders can cover long stretches without grinding through elevation changes. In summer, wildflowers line the corridor and the Tetons dominate the eastern horizon. In winter, the trail transforms into a popular snowmobile and Nordic skiing route, connecting to a broader network of groomed paths.

What makes this trail special is the sense of quiet immensity. You’re crossing open farmland and gentle foothills with Grand Teton as your constant companion, but without the crowds that define the national park experience. Birdwatchers will find raptors, sandhill cranes, and migratory species along the route, particularly near wetland crossings.

The best time to visit depends on your activity: June through September for biking and hiking, December through March for winter sports. Services are limited along the trail itself, so bring water and supplies from Ashton or Tetonia. Both towns offer small-town dining and lodging options for overnight stays.

Explore Nearby

• Salmon–Challis National Forest — National Forest in Idaho
• Payette National Forest — National Forest in Idaho
• Western Heritage Historic Byway — Scenic Byway in Idaho
• Pioneer Historic Byway — Scenic Byway in Idaho
• Eightmile Day Use Area — Public Land in Idaho