Ennis Lake is a man-made body of water in southwestern Montana’s Madison County. It was formed in 1905 as a result of the Madison Dam ’s construction on the Madison River, at the head of Bear Trap Canyon.

The building of Madison Dam on the Madison River formed Ennis Lake. This 4800-acre lake is quite shallow and often gets very warm during the height of summer, which limits trout populations and can hinder fishing. The lake itself essentially divides the Madison River.

Ennis Lake is accessible year round. The Lake is located 10 miles northeast of the town of Ennis. Ennis Lake is shallow allowing the water to be warmer than expected during the summer months. On the Lake and in the area, you can enjoy fishing, water sports, and wildlife watching.

Very shallow shoreline; boat ramp available at BLM site Kobayashi Beach. 6 miles north of Ennis on Hwy 287 to milepost 55 at McAllister, MT, turn right onto North Ennis Lake Road, then east 2 miles. Click on rows to select them for use in other tabs. This is a preview, all fields will be visible by selecting a download option.

Ennis Lake was formed when a dam was built on the Madison River at the head of the Bear Trap Canyon. The lake is shallow meaning the water is warm, just right for morning water sports and windsurfing in the windy afternoon.

Escape to Ennis Lake in one of our unique RV sites featuring spacious grounds and lake views. Experience the ultimate lakefront getaway with our collection of cabins at Ennis Lake. Embark from the marina to explore Lake Ennis on paddle board, kayak, or boat.

In Ennis, MT, there’s something for everyone. Spend your day shopping downtown, fishing the world-famous Madison River, or relaxing by the serene Ennis Lake. Don’t miss a visit to the Ennis Lions Club Park, perfect for family outings and picnics.

Ennis Lake sits northwest of Yellowstone National Park. It is less than an hour from the lake to the national park, making it a fantastic day trip or a great home base for an extended exploration of one of America’s most popular parks.

Enticing Ennis Lake. Just north of Ennis is a reservoir that, viewed from the surrounding mountains , looks like the haphazard puddle of a spilled bucket. Though small and shallow—the deepest sections mark out around 20 feet—Ennis Lake is a great spot for a summer excursion.

Teeming with brown and rainbow trout, Ennis Lake, spanning 1,920 acres, provides ample space for anglers and boaters to bask in its serene waters. Boats of all kinds, from sailboats to canoes, gracefully navigate the crystal-clear expanse.