Bitterroot to Wind River: Hamilton to Riverton Drive

The drive from Hamilton, MT to Riverton, WY spans about 450 miles, crossing the Continental Divide at 9,430-foot Lost Trail Pass. The route blends Montana's Bitterroot Valley with Wyoming's Wind River Basin, offering stark geological contrasts.

You'll traverse three mountain ranges—the Sapphires, Pintlers, and Wind Rivers—each with distinct character. The journey takes roughly 7.5 to 8.5 hours of pure driving time, but plan for a full day to absorb the scenery.

Notably, the route passes near the Idaho-Montana border, where the Continental Divide Trail crosses U.S. Highway 93. This spot marks the headwaters of both the Missouri and Columbia River systems.

For those seeking the how to find the best stops and hidden gems between cities, this guide highlights both iconic viewpoints and quiet overlooks.

U.S. Highway 93 dominates the first leg from Hamilton to Salmon, Idaho, passing through the Bitterroot National Forest. From Salmon, take ID-28 to ID-22, then cross into Wyoming via U.S. 20 through Yellowstone's western gateway.

Fuel stations are sparse between Salmon and Dubois, WY (about 170 miles), so plan to fill up in Salmon or in the small town of Leadore, ID. Gas prices tend to rise by 10-15% in remote areas.

• Distances: Hamilton (MT) to Salmon (ID) – 85 miles, approx. 1h 45m.
• Fuel stop: Leadore, ID (mile marker 83 on ID-28) – small station with basic supplies.
• Road conditions: U.S. 93 is well-maintained year-round, but winter requires chains.

The route crosses the historic Nez Perce National Historic Trail in Idaho, which follows the 1877 flight of the Nez Perce people. Interpretive signs are present near Salmon.

Cellular coverage is patchy, especially in the Bitterroot and Pioneer Mountains, so download offline maps. The speed limit drops to 45 mph in construction zones near Ashton, Idaho.

Hamilton's River Park offers a gentle stroll along the Bitterroot River, ideal for stretching legs before heading south. East of Hamilton, Lake Como provides a scenic detour with camping at 4,000 feet elevation.

In Salmon, Idaho, the Sacajawea Interpretive Center honors the Lemhi Shoshone woman who guided Lewis and Clark. The center houses artifacts and a replica tipi, offering a cultural pause.

• Scenic pullout: Lost Trail Pass (mile 54 on U.S. 93) – panoramic views of the Bitterroots.
• Geothermal feature: Kelly Canyon Hot Springs near Ashton, ID – natural pools at 120°F.
• Historic site: Snake River Overlook (U.S. 20) – where Ansel Adams photographed in 1941.

Riverton's cultural anchor is the Wind River Heritage Center, which traces Wyoming's homesteading era. Local shops sell beadwork and bison-hide goods, supporting the nearby Eastern Shoshone tribes.

Along the way, farm stands in Rexburg, ID offer fresh raspberries in July. The Teton Scenic Byway (ID-33) detour adds 30 minutes but showcases the Teton Range's west side.

U.S. 93 has narrow shoulders and frequent wildlife crossings—mule deer and elk—particularly between dawn and dusk. Drive with high beams when clear, and watch for “animal crossing” signs.

For families, Salmon's city park has a splash pad and mini-golf. In Rexburg, the Yellowstone Bear World (exit 332 on I-15) offers drive-through bear encounters from 9 AM to 6 PM during summer.

• Pet-friendly stop: Iron Bridge Fishing Access near Dubois, WY – off-leash areas with river access.
• Rest area: Pine Creek Pass (mile 148 on U.S. 26) – tables and vault toilets.
• Child activity: Gilmore Ghost Town (12 miles SE of Leadore) – free exploration of abandoned buildings.

To combat fatigue, plan stops every 2 hours; allowed 24-hour rest areas are at Spencer, ID and Sand Draw, WY. caffeine sources: Salmon's Hotel de Elks serves strong coffee; Dubois' Maverik has soda machines.

The route includes several steep grades—Lost Trail Pass and Teton Pass (near Victor, ID if detoured). Use engine braking to avoid brake fade. In winter, carry traction devices beyond Ashton.