Island Park Reservoir is a 7,000-acre reservoir and recreational paradise located southwest of West Yellowstone. Formed by the dam built across Henry's Fork, a tributary of the Snake River, the Island Park Reservoir is surrounded by the magnificent Caribou-Targhee National Forest and boasts 64 miles of shoreline with several campgrounds and boat ramps operated by the US Forest Service. The Reservoir offers a wealth of recreational opportunities, including four major boat ramps providing access for canoeing and kayaking, pleasure boating, pontooning, jet-skiing, windsurfing, water-skiing, and sailing. There is excellent fishing in the lake, as well as sandy beaches for sunbathing and swimming.

Plan Your Trip

Get Ready to Go!

Need some more help?


Read our Reservations & Travel Planning Tips guide.