Lost Creek Dam and Reservoir, Weber Basin Project, are on Lost Creek, 12 miles upstream from its confluence with Weber River in an open setting northeast of Croyden, Utah at the 6,000-foot elevation.. Recreation at Lost Creek Reservoir is directly managed by the Bureau of Reclamation. The site has primitive facilities and no on-site manager or law enforcement. Use at your own risk. The narrow lake only allows wakeless boating on its 360 surface acres. Fishing is a popular activity at the reservoir and game species include rainbow trout and cutthroat trout. Improved gravel roads beyond provide access around the reservoir. Francis Canyon and Lost Creek Dam U.S. Geological Service maps cover the area. There is no overnight camping.