Interstate 90 enters Montana and Mineral County from Shoshone County, Idaho over the high Lookout Pass, which traverses the Coeur d'Alène Mountains of the Bitterroot Range, and immediately has its first interchange, a partial cloverleaf serving extreme northwest Mineral County and access to Lookout Pass Ski and Recreation Area. The highway continues southeasterly through woodlands, paralleling the St. Regis River, before meeting the Dena Mora (Lookout Pass) rest area east of the Idaho-Montana border. About a from the rest stop is a diamond interchange, serving a small minor road into the St. Joe National Forest in Idaho.