Lake Elwell (a.k.a. Tiber Reservoir) is a reservoir in north central Montana. The reservoir was created by the damming of the Marias River at the Tiber Dam. Lake Elwell was named for Judge Charles B. Elwell (1888–1974), former director of the Montana Reclamation Association. See also List of lakes in Montana List of lakes in Liberty County, Montana References Elwell Bodies of water of Liberty County, Montana Bodies of water of Toole County, Montana Protected areas of Liberty County, Montana Protected areas of Toole County, Montana Montana articles lacking sources