Heart Lake Trailhead Access is a popular backcountry trailhead located on the east side of the South Entrance Road, approximately 7 miles south of West Thumb, featuring a parking area and information kiosk. The trailhead provides access to a moderate 17.

4-mile one-way trail to Heart Lake, though the area is closed April 1 through June 30 due to bear management. A backcountry permit is required for overnight camping, fishing, and boating, with vault/composting toilet facilities available at the trailhead.