Lower Jackass Campsite is a riverside campground located at river mile 37. 6 on the Middle Fork Salmon River in Custer County, Idaho, with a capacity of 20 people at water levels of 2. 5 feet or less.

This mid-use campsite does not offer layover availability and experiences moderate use during July-August, making it suitable for paddlers and river recreationalists navigating the Middle Fork Salmon River corridor.