Hidden Lake Campground is a primitive 5-site, first-come, first-served campground southwest of Seeley Lake offering free camping year-round (snow-dependent access).

The campground has no amenities—no water, restrooms, or trash service—so visitors must be fully self-sufficient, but it provides access to a scenic 33-acre lake ideal for non-motorized boating and fishing. Located on Forest Service Road 17662, approximately 8.

7 miles from Seeley Lake via Beaver Creek Road, it's best visited during summer and shoulder seasons when road access is reliable.