Gunlock Reservoir State Park

Near St. George, Utah

Reservoir
Gunlock Reservoir with red cliffs along the far shore

Photo: Thure Johnson, CC BY 2.0 via Wikimedia Commons

Map showing location of Gunlock Reservoir State Park
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37.2817°N, 113.7692°W
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About Gunlock Reservoir State Park

Gunlock Reservoir sits in a scenic red rock canyon northwest of St. George, offering swimming, boating, and fishing in the southern Utah desert. The reservoir's clear blue waters contrast beautifully with the surrounding red sandstone cliffs. Several sandy beach areas provide easy water access for swimming. The warmer climate here extends the swimming season compared to other Utah locations.

Access & Directions

Located about 15 miles northwest of St. George via Highway 18 and the Gunlock Road. The state park has developed facilities including restrooms and boat ramps. Day-use fees apply. The reservoir level fluctuates based on irrigation demands.

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Safety Information

No lifeguards on duty. Check water levels before planning swim activities as the reservoir level varies. Watch for boats in swimming areas. The sun is intense—use sun protection.

Best Time to Visit

Late spring through early fall. The southern Utah location means warmer temperatures and a longer swimming season. Summer can be very hot—early morning or late afternoon visits are pleasant.

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