Sagehen Flats is a free, BLM-managed campground along the Blackfoot River offering 4 semi-developed sites on a first-come, first-served basis with picnic tables, fire rings, and vault toilets.

The site features an undeveloped put-in/take-out for kayaking, canoeing, and rafting, plus excellent fishing access along the river.

Located east of Blackfoot, Idaho, it's ideal for visitors seeking a primitive camping experience with water-based recreation, though there's no potable water on-site and visitors must pack out all trash.