Ennis, on the Madison River, was named for William Ennis, who was one of the first three men to locate din the Madison Valley.

Ennis is surrounded by three beautiful mountain ranges: the Madison Range, the Gravelly Range, and the Tobacco Root Mountains. In addition to its majestic mountain view, Ennis also offers access to some of the finest river locations in the state by way of the picturesque Madison River. Also, just west of Ennis lie the famed western towns of Virginia City and Nevada City.

Ennis is a good-time western town and is full of cowboys, anglers and outdoor recreationists. The Western flavor is for real and there's plenty of action along the boardwalk on weekends. Visitors will find nearly 3 million acres of publicly accessible national forest lands surrounding Ennis. Ennis is the center for activities on the Madison River, which is renowned for its first-rate trout fishing.

The town is also the home of the Ennis National Fish Hatchery.