Lake Elwell, body of water
Lake Elwell, also known as Tiber Reservoir, is a large body of water in Montana's open plains with roughly 200 miles of shoreline and covering more than 20,000 acres. The water is held back by a massive earthen dam built in 1956 on the Marias River, and is accessed through five boat ramps and a marina facility.
The dam was built in 1956 on the Marias River, primarily to control flooding and provide water for irrigation and nearby communities. The Lewis and Clark Expedition passed through this region in the early 1800s, and interpretive signs at the lake still commemorate that historic journey.
The lake takes its name from a local rancher whose legacy remains connected to the region. The area has become a gathering place for outdoor enthusiasts, particularly during summer, when the shoreline fills with campers and boaters sharing the open landscape.
The best time to visit is from May through September when weather is warm and all campgrounds are open, with summer being the busiest season. The last stretch of the approach is typically unpaved, so visitors should bring a good map or GPS and be prepared for road conditions, especially after rain.
The Bootlegger Trail, a long gravel road north of the reservoir, winds through 30 miles of open country with antelope, deer, and pheasants alongside old farms and school buildings. The drive offers visitors a glimpse into rural Montana life that feels distinctly different from cities, filled with farmstead views and wildlife.
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