Steinaker State Park, State park and International Dark Sky Park in Uintah County, Utah.

Steinaker State Park is a state park and reservoir 7 miles (11 km) north of Vernal, at 5,500 feet (1,700 m) in Uintah County. The 162-foot-high (49 m), 1,997-foot-long (609 m) earthfill Steinaker Dam, built 1959–1962, holds back Ashley Creek. Juniper, cacti and sagebrush grow around the water, where visitors swim, boat and waterski.

The site was established as a state park in 1964, named after settlers who came to the region generations earlier. The dam was constructed between 1959 and 1962, creating the reservoir that became the park's defining feature.

The park takes its name from John Steinaker, a member of one of the early settler families in the region. Local history remains woven into the landscape through this remembrance of the pioneers who shaped the valley.

The park lies 7 miles (11 km) north of Vernal at 5,500 feet (1,700 m) elevation, with year-round facilities: a sand beach, boat launching ramp, restrooms, 31 RV campsites, two group-use pavilions, sewage disposal and fish cleaning stations. Summers are hot and winters cold in this arid climate, so plan around the season you want.

Steinaker Dam, finished in 1962, is a 162-foot-high earthfill structure 1,997 feet long that holds back the reservoir; the water comes from Ashley Creek as part of the CUP-Vernal Unit project. Birders watch golden eagles, hawks, vultures, owls and osprey over the water and shore.