Coulter Campground is a remote, boat-in-only primitive campground with 5 campsites on the east side of Upper Holter Lake in the Helena-Lewis and Clark National Forest, accessible via private boat from Gates of the Mountains Boat Club or Holter Dam area, or by hiking Trail #257.

The campground offers vault toilets and fire pits but no potable water, operating on a first-come, first-served basis with no fees and a 14-day maximum stay.

Located adjacent to the Gates of the Mountains Wilderness within a scenic river canyon, it provides excellent opportunities for wildlife viewing, fishing, and backcountry solitude.