Causey Reservoir, Mountain reservoir in Weber County, United States.

Causey Reservoir is a mountain lake in Weber County that stretches across three canyons in steep forested terrain. The water sits at about 5,700 feet elevation and is held back by an earth dam constructed in the 1960s.

The Bureau of Reclamation built this reservoir between 1962 and 1966 to supply water to the northern Wasatch Front region. The project was part of broader water management efforts in the mountain area.

The northern arm hosts Camp Kiesel, which serves as a gathering place for youth groups and scouting programs. It brings young people together to spend time outdoors and learn from the mountain setting.

There is no dedicated boat launch, and only wake-less speeds are permitted on the water. Swimming and cliff jumping are popular but hazardous: several drownings have occurred, including divers who went under and did not resurface. Camping and picnic sites lie near Memorial Park and along the Ogden River.

Causey is one of the few Utah waters where spearfishing is legal, and the reservoir holds Kokanee salmon alongside rainbow, cutthroat and brown trout. The 182-foot maximum depth, in a valley reaching into three canyons, is what draws divers and anglers.