The Montana Overlanding Guide

Montana is the fourth-largest state by area and the third-most sparsely populated. Federal and state agencies manage more than 31 million acres of public land here, including two of the country's most-visited national parks (Glacier and Yellowstone), 11 national forests covering nearly 17 million acres, 8 million acres of BLM land, and 54 state parks. The practical effect for vehicle-based travel is a long list of credible itineraries across nearly every part of the state.

The state's motto, "Oro y Plata" (gold and silver), survives from the 19th-century mining era. The boomtowns are mostly ghosts now, but the road network that served them survives. Forest Service routes through the Bitterroots, the Pioneers, and the Big Belts form the foundation of most backcountry trips in western Montana.

Montana overlanding overview

Montana splits cleanly into two regions. The Western Mountains and the Eastern Plains are separated by the Central Front, which follows the Continental Divide and runs north-northwest across the middle of the state. The western half holds the Rockies and roughly 100 named subranges, with the highest peaks topping 12,000 feet (Granite Peak, the state high point, sits at 12,807 feet). The eastern half is prairie and badlands broken by isolated smaller ranges.

Montana's tourism authority recognizes six regions for trip planning: Glacier Country (northwest), Central Montana, Missouri River Country (northeast), Southwest Montana, Yellowstone Country (south-central), and Southeast Montana. The divisions are useful because driving distances across the state are large; most multi-day itineraries focus on one or two regions rather than attempting the full state.

Climate

Summers are short, warm, and sunny. Winters are long, cold, and snowy. Montana holds the lower-48 record for coldest recorded temperature, −70°F at Rogers Pass on January 20, 1954. Winter storms can make paved highways and backcountry roads alike treacherous, and most high-elevation routes close from October or November through May.

The climate west of the Central Front is milder than the east, with warmer winters, cooler summers, and lighter winds. Annual snowfall averages around 50 inches statewide but varies sharply by local microclimate.

Montana overlanding destinations and routes

Glacier Country

Glacier National Park anchors the northwest corner of the state. The park is one of the busiest in the country in peak summer, and timed-entry reservations are required to access most of the popular entrances during the day. The surrounding national forests carry far less traffic and account for most of the area's backcountry overland opportunities.

North Fork Flathead River area

The North Fork Flathead River flows south-southeast from its headwaters in British Columbia along the western boundary of Glacier National Park. North Fork Road, a mostly-dirt route, traces the river's east side from Columbia Falls north to the outpost of Polebridge, where the Polebridge Mercantile (a backcountry bakery and general store) is the standard stop.

Bowman Lake, inside the park west of Polebridge, is a popular base for paddling and hiking. The road into Bowman is narrow and slow; entrance requires arriving early in peak season because the lot fills by mid-morning. The Flathead National Forest extends east of the North Fork Road, with hundreds of miles of Forest Service roads, 32 designated campgrounds, and dispersed camping permitted across most of the forest. Check with the local ranger station for current road conditions, since many roads are not accessible in winter.

Going-to-the-Sun Road

Going-to-the-Sun Road, or "Sun Road" locally, is the only road that crosses Glacier National Park. It crests at Logan Pass at 6,646 feet on the Continental Divide. The drive is paved, two-lane, and closed in winter; both timed-entry vehicle reservations and standard park admission are required during the open season. The road can be accessed from the West Glacier entrance or the Saint Mary entrance, and is often combined with a North Fork Flathead River detour.

Southwest Montana

Magruder Corridor Road

The Magruder Corridor Road is a 101-mile dirt and gravel route between the Red River area of Idaho and Darby, Montana. The road runs the spine between two of the largest wilderness areas in the Lower 48: the 1.2-million-acre Selway-Bitterroot Wilderness to the north and the 2.3-million-acre Frank Church-River of No Return Wilderness to the south.

The road was built by the Civilian Conservation Corps in the 1930s. It is narrow, rocky, steep, and winding, with few turnouts for passing oncoming vehicles. A high-clearance four-wheel-drive truck or SUV is appropriate; the Forest Service discourages trailer towing because of the hairpin turns, and low-clearance RVs should not attempt the route. Several primitive campgrounds sit along the corridor, and dispersed camping is allowed in many areas. Plan a minimum of two days; three is more comfortable.

Beaverhead-Deerlodge National Forest

Beaverhead-Deerlodge National Forest, at 3.35 million acres, is the largest national forest in Montana. It covers the southwest and south-central parts of the state and contains 50 designated campgrounds, dispersed camping across most of its area, and two of the state's named backcountry routes: Gravelly Range Road and Pioneer Mountains Scenic Byway.

Gravelly Range Road

Gravelly Range Road is a 72-mile route connecting Ennis with Centennial Valley to the south. The route includes a 32-mile stretch along a high-altitude plateau, with the paved section between Ennis and Black Butte Mountain offering the longest sustained mountain views. South of Black Butte the road becomes dirt and gravel as it descends into Centennial Valley, which has no stores, fuel, or cell coverage. The Centennial Valley Backcountry Road continues south from there for further exploration.

Pioneer Mountains Scenic Byway

Pioneer Mountains Scenic Byway is a paved 49-mile road that follows the Wise River along the length of the Pioneer Range in Beaverhead-Deerlodge National Forest. The route runs as Forest Service Highway 73 between Montana State Highway 43 (Wise River) and County Highway 278. The road is closed from December 1 through May 15 between Pettengill parking lot and Elkhorn Hot Springs.

The byway crests at a 7,800-foot divide between the north-flowing Wise River and the south-flowing Grasshopper Creek, with granite peaks topping 10,000 feet visible along the route. Several established campgrounds sit along the road. Side routes include a 5-mile dirt spur to the Coolidge ghost town and another to the abandoned Elkhorn silver mine.

Yellowstone Country

The northern strip of Yellowstone National Park sits inside Montana, though most of the park lies south in Wyoming. Bozeman is the major staging city for the region.

Most overland trips into the Montana side of Yellowstone country center on Custer Gallatin National Forest, which wraps the park's northern and northeastern flanks. An end-to-end route can be stitched from Bozeman south through Custer Gallatin, into Yellowstone proper, and on into the Tetons of Wyoming.

Southeast Montana

Bighorn Mountains

The Bighorn Range extends roughly 200 miles from southern Montana into northern Wyoming, separating the high plains of the Powder River country from the Bighorn Basin. Billings is the practical staging town for trips into the Montana side of the range.

Most of the range north of the state line lies within the Crow Reservation and is closed to public vehicle access. The Bighorn Canyon National Recreation Area, managed by the National Park Service, protects a corridor along the canyon and is split between Montana and Wyoming. Devil's Canyon Overlook on the Montana side is the most-visited single feature.

Outside the reservation and recreation area, surrounding land is administered largely by the BLM, with a network of truck trails accessible to high-clearance vehicles. The bulk of the Wyoming side of the range falls inside Bighorn National Forest, which carries three named scenic routes: the Bighorn Scenic Byway, Cloud Peak Skyway, and Medicine Wheel Passage.

Big Sky Back Country Byway

The 105-mile Big Sky Back Country Byway connects Terry and Wolf Point along the Lewis and Clark National Historic Trail, crossing badlands and rolling prairie. The route is part of the National Scenic Byways Program and stays drivable year-round on its all-weather surface. Interpretive kiosks in Terry, Circle, and Wolf Point cover local history and natural features. The byway takes roughly two hours one-way at posted speeds.

Montana BLM lands

Outside the national parks and forests, BLM-administered land covers about 8 million acres across Montana, with significant tracts in the eastern half of the state and along the Missouri Breaks. The BLM Montana state office maintains route guides and current closure information. Dispersed camping is allowed on most BLM land with a standard 14-day stay limit.