Island Park Dam

Driving north out of Pocatello on Highway 20 takes you up into the Targhee National Forest and is a popular way to access Yellowstone National Park from the west. You’ll also be driving right by Island Park Dam, which combines with its reservoir to offer some excellent scenery and outdoor recreation opportunities. This is a beautiful part of the state and will worth the stop if you are going through the area.

Fun Facts About Island Park Dam

-Construction began on Island Park Dam in 1937 and was completed in 1939.

-Island Park Dam is owned and operated by the United States Bureau of Reclamation.

-Island Park Dam is an earthfill dam.

-Island Park Dam is 94 feet high.

-Island Park Dam measures in with a very impressive 9,500 foot length.

-The water backed up behind Island Park Dam is known as Island Park Reservoir.

-Island Park Dam sits on Henrys Fork, which is a tributary of the Snake River. Some people and places also refer to it as the north fork of the Snake River.

-Water backed up behind Island Park Dam forms the Island Park Reservoir.

-Some of the water from the Island Park Reservoir enters the Cross Cut Canal and is used to irrigate farmland in Madison and Fremont counties in Idaho, as well as Teton County in Wyoming.

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