Sun Valley to Riverton Road Trip Guide: Scenic Drive Through Idaho and Wyoming

The drive from Sun Valley, Idaho to Riverton, Wyoming covers approximately 325 miles via US-20 and US-26, taking around 5.5 hours without stops. This route traverses the Snake River Plain, passes through the high desert of central Idaho, crosses the Continental Divide at Togwotee Pass (9,658 feet), and descends into the Wind River Basin. Historically, this corridor follows part of the Oregon Trail and the Lander Cutoff, used by emigrants in the 1850s to avoid the rugged Snake River Canyon. The highway offers a mix of volcanic landscapes, mountain vistas, and wide-open plains.

• Key highways: US-20 east from Sun Valley to US-26 near Idaho Falls, then US-26 east to Riverton.
• Driving time: 5.5 hours without stops; budget 7-9 hours with sightseeing.
• Geographic highlights: Craters of the Moon National Monument, Grand Teton National Park (detour), Wind River Canyon.

For more on how to find the best stops and hidden gems between cities, this guide covers key considerations for your journey.

US-20 and US-26 are well-maintained, two-lane highways with some passing lanes. Fuel stations are sparse east of Carey, Idaho, especially between Craters of the Moon and Riverton. Plan to fill up in Sun Valley, Idaho Falls, or Dubois, Wyoming. Cell service is intermittent in the mountains and remote stretches.

• Best stops Sun Valley, ID to Riverton, WY: Craters of the Moon National Monument (mile 80), St. Anthony Sand Dunes (mile 120), Dubois (mile 220), Wind River Canyon (mile 300).
• How long to drive Sun Valley, ID to Riverton, WY: 5.5 hours direct, but 7-9 hours with stops is recommended.
• Is it worth driving Sun Valley, ID to Riverton, WY: Yes, for the volcanic landscapes, mountain views, and solitude.

Things to do between Sun Valley, ID and Riverton, WY include hiking lava tubes, visiting a bison refuge, and exploring the Wind River Indian Reservation.

Road conditions: Winter can close Togwotee Pass; check weather. Summer offers clear roads but afternoon thunderstorms are common. Services in towns like Carey, Arco, and Dubois are limited; carry water and snacks.

• Gas stations: Arco has one; Dubois has two; fill up before Togwotee Pass.
• Lodging: Options in Sun Valley, Idaho Falls, and Dubois; camping at Craters of the Moon and along the Wind River.

Craters of the Moon National Monument is the standout natural attraction—a vast lava field with cinder cones, spatter cones, and lava tubes formed 15,000 years ago. The 7-mile Loop Road offers access to caves and hiking trails. Continue east to the St. Anthony Sand Dunes, 10,000 acres of white quartz sand. Near Dubois, the National Bison Range (on the Wind River Reservation) allows viewing of bison herds. The route then climbs into the Absaroka Range, crossing Togwotee Pass with panoramic views of the Teton Wilderness. Descending into the Wind River Basin, the landscape shifts to sagebrush steppe and finally the dramatic Wind River Canyon, a narrow gorge carved by the Wind River through ancient rock.

• UNESCO World Heritage Sites: None directly on route; Yellowstone (1 hour north of West Yellowstone) is a UNESCO site, but not on this route. Craters of the Moon is a National Monument and part of the National Park System.
• Hidden off-route spots: The Bannack Ghost Town in Montana (2 hours north) or the Red Fish Lake in the Sawtooth Mountains (1 hour west of Sun Valley).

Local commerce revolves around tourism, ranching, and energy. Sun Valley is a luxury resort town with upscale dining and shopping. Idaho Falls has chain stores and restaurants. Dubois is a small ranching community with a general store and cafes. Riverton is a regional hub for the Wind River Reservation, with a mix of Native American and Western culture. The reservation is home to the Eastern Shoshone and Northern Arapaho tribes; visitors can experience powwows and cultural centers.

• Culinary infrastructure: Sun Valley offers fine dining; Idaho Falls has diverse options; between, options are limited to gas station snacks or picnic lunches.
• Local specialties: Huckleberry products, bison burgers, fry bread on the reservation.

Roads are generally safe, but wildlife (deer, elk, bison) poses a hazard, especially at dawn and dusk. Watch for gravel trucks on US-26 near construction zones. Snow can close Togwotee Pass from October to May; always carry chains in winter. Fatigue management: Plan rest stops every 2 hours at Craters of the Moon visitor center, Arco, Dubois, or the Wind River Canyon scenic overlook. The route has few rest areas; use gas stations or pullouts.

• Family and child suitability: Craters of the Moon offers easy paved trails and a visitor center with exhibits. Kids will enjoy lava tube exploration (with flashlights) and the sand dunes (sledding). The Wind River Canyon has pullouts for short walks and photo ops.
• Pet-friendly framework: Pets allowed on leash at Craters of the Moon and most outdoor stops. National forest areas permit pets. Service animals allowed in public buildings.

Infrastructure safety: Roads have adequate signage but limited lighting. Cell service is poor; download offline maps. Emergency services are sparse—nearest hospital in Idaho Falls or Riverton. Carry a first aid kit and extra supplies.

• Climatic conditions: Summer highs 80s°F (27°C) with thunderstorms; winter lows -20°F (-29°C) with snow. Spring and fall are variable. Best months: June-September for clear roads and moderate temps.
• Route aesthetics: Volcanic fields, high desert, mountain passes, river canyons. Photography highlights: sunrise at Craters of the Moon, fall colors along the Wind River.

For a restful stop, consider the Ethel's Place in Dubois for homemade pie. The Wind River Canyon pullouts at mile 300 offer interpretive signs about geology. fatigue management: stretch your legs on short hikes like the Inferno Cone (0.5 mile) at Craters of the Moon or the Buffalo Pasture Trail in Dubois. Plan to spend the night in Dubois or Riverton if you start late.

• Recommended itinerary stop: Craters of the Moon (2 hours), Dubois (lunch), Wind River Canyon (photo stop).
• Hidden off-route spots: The Eden Valley (south of US-26) for petroglyphs, or the Shoshone National Forest for wilderness hikes.