The Lamar River Stock Trailhead is a dedicated horse packer access point featuring a large pullout with restrooms and hitching posts, located approximately 0. 5 mile west of the main Lamar River Trailhead near Tower Junction in Yellowstone National Park.

This trailhead provides access to the Stock Cutoff Trail, a short 0. 9-mile route that fords Soda Butte Creek and connects to the main Lamar River Trail system.

The facility is specifically designed for pack horse use and offers convenient facilities for those accessing the Lamar Valley's extensive trail network.