Hebgen Lake is a reservoir created by the Hebgen Dam, located in Gallatin County in southwest Montana. It is well known for the 1959 Hebgen Lake earthquake (magnitude 7.1 to 7.5) which occurred nearby on August 17, 1959, forming Quake Lake, which is located immediately downstream. Recreation Hebgen Lake and the surrounding area offer many recreational activities: camping, fishing, boating, and hiking. Campgrounds include Rainbow Point and Cherry Creek. Rainbow Point is the largest campground on the lake, offering four "loops." Each loop contains approximately 20 campsites. Each campsite can accommodate a full-size camper and one or two vehicles. See also Firehole Ranch Quake Lake Yellowstone Caldera Images References External links Hebgen Lake Bathymetric Map Montana Fish, Wildlife & Parks Bodies of water of Gallatin County, Montana Reservoirs in Montana Protected areas of Gallatin County, Montana Gallatin National Forest