Located just 15 miles west of Yellowstone National Park, this high mountain lake is the kind of place fishermen dream about. The state park was named after the lake which was named after explorer Major Andrew Henry. It opens the Thursday before Memorial Day and closes mid-October, weather permitting. Anglers fish for cutthroat, brook and rainbow-cutthroat hybrid trout. The park has a modern fish cleaning station near the boat ramp. Camping is at one of 83 sites with electric only to full hookup and there are camping-cabins available for rent. During winter, information on Henrys Lake can be obtained by calling Harriman State Park at (208)558-7368.


Eastern Idaho, 15 miles from Yellowstone Park


From Ashton travel N. on Hwy 20 approximately 45 miles. From West Yellowstone travel S. on Hwy 20 approximately 15 miles. The park entrance is on the west side of Hwy 20. See location map below.

Nearest City

Island Park

Street Address

3917 E. 5100 N.
Island Park ID, 83429

Mailing Address

3917 E. 5100 N.
Island Park ID, 83429




7am-10pm daily


$5 per vehicle/day for Day-use; Camping fees: S/W/E-$32.56, W/E-$30.44, E-$26.20, and cabins-$58.00. Idaho residents buy an Idaho Passport for $10.00 at your County DMV or anyone can buy an Annual MVEF Pass at an Idaho State Park to save on camping.


Boating Facilities, Campsites, Dump Station, Handicap Access, Motor Coach Parking, Parking, Restrooms, Vault Toilets

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