Moon Pass

Winding through the rugged beauty of Idaho’s backcountry, Moon Pass, also known as North Fork St. Joe Road, is a scenic gateway that connects the historic town of Wallace with the quiet community of Avery along the St. Joe River. This 30-mile route is more than just a drive; it's a journey through time and terrain, following the path of the decommissioned Milwaukee Road railroad that once carried electrified trains from 1909 until 1980.

A large portion of the road rides atop the original rail grade, offering travelers a steady, well-maintained track that transitions from pavement just outside Avery to gravel, and eventually dirt and rock as you climb toward the summit of Moon Pass. Along the way, you’ll pass through seven narrow, one-lane train tunnels and cross over remnants of old trestles, with sweeping views of the North Fork of the St. Joe River unfolding around every bend. Thanks to seasonal maintenance by Shoshone County. It usually opens to vehicles in late May or early June, depending on snowmelt and tunnel upkeep. During winter, the route is closed to cars and may be groomed for snowmobiling instead. There are no visible campsites available off this trail.

One of the most captivating elements of this drive is its history. The route was once part of an electrified rail line designed to mitigate wildfire risk following the devastating 1910 fire. Today, relics of that era remain, like the railcar on display next to the historic depot in Avery, where you can dive deeper into the Milwaukee Road's legacy.

Despite its mountainous surroundings, this is an easy and accessible drive. The road is full-width and generally in good condition.

Keep an eye out for shuttle buses traveling to and from the nearby Route of the Hiawatha bike trail. Whether you're in it for the views, the tunnels, or the history, Moon Pass is a must-do for anyone looking to explore a scenic and storied slice of Idaho’s 4x4-friendly wilderness.