2020 Map of Hebgen Dam

About this map

Hebgen Dam controls the flow of the Madison River at the head of a complex geological landscape within the Gallatin National Forest. This 2020 record illustrates the intricate shoreline of Hebgen Lake and the nearby Earthquake Lake, reflecting a region defined by dramatic seismic history and high-altitude water management. The terrain transitions from the lake's edge toward the formidable Henrys Lake Mountains and the Continental Divide at the southern boundary. Along the western slopes of Kirkwood Ridge, a network of seasonal drainages such as Kirkwood Cr and Moonlight Cr feed the reservoir. Locally significant access points like Ghost Village Rd and the Firehole Ranch Rd indicate the area's long-standing utility for backcountry recreation and ranching, while landmarks like Coffin Mtn and Upper Coffin Lake mark the high country of the Madison Range.