Grassy Lake Road Access provides entry to a 36-mile gravel road connecting Flagg Ranch to Ashton, Idaho, with eight camp areas offering 20 primitive campsites available free on a first-come, first-served basis.

Each campsite includes a picnic table, vault toilet, and bear box, with no water available; high-clearance vehicles are recommended due to rough road conditions.

The road opens June 1st and closes seasonally for snow, providing access to hiking trails, fishing opportunities at Grassy Lake Reservoir, and the Winegar Hole Wilderness between Yellowstone and Grand Teton National Parks.