Introduction
US-20 west out of Thermopolis climbs over the Owl Creek Mountains via Wind River Canyon, where 2.8 billion-year-old granite walls rise 2,500 feet. This road trip packs geologic time, a UNESCO World Heritage Site connection, and a changing climate into under 90 miles.
Driving time is about 1 hour 40 minutes without stops—but plan for half a day to explore. This guide covers key stops, safety, and hidden gems along the route, plus when it's worth the drive.
Below is a snapshot of route basics and costs:
| Distance | 87 miles (140 km) |
|---|---|
| Typical drive time | 1 hr 40 min (no stops) |
| Main highways | US-20, WY-789, WY-133, WY-135 |
| Estimated fuel cost | $10–$15 depending on vehicle |
| Best season | May–October (winter requires caution) |
Road Safety, Family Stops, and Fatigue Management
The most dangerous part is Wind River Canyon, where sudden curves and rockfall keep you alert. Use pullouts to take photos; don't stop on the pavement. For fatigue, stop at the rest areas in Thermopolis (at the Hot Springs State Park) and near the Wind River Canyon's north portal.
Family-friendly stops: Hot Springs State Park in Thermopolis has a free state bathhouse with a water slide and pools; the Wyoming Dinosaur Center (open daily, $14 adults) is a hit with kids, though it's in Thermopolis, so schedule it before you leave.
Pet-friendly: Most pullouts and trails allow dogs on leashes. Hot Springs State Park restricts pets from the bathhouse, but the park's walking paths are fine. Carry water because summer temps can hit 95°F (35°C).
Unplanned detours: On the reservation side, the Wind River Canyon Petroglyphs are an easy hike off WY-135. For an off-route gem, take the gravel road to the Hidden Hand (a rock climbing area) 8 miles south of Lander—well-known among locals.
Natural Landscapes and Local Commerce
The drive itself is the show: Wind River Canyon's layered rock reveals 2.8-billion-year-old granite at the bottom, capped by Paleozoic limestone. Just east of the canyon, the Boysen Reservoir offers wide water views. Beyond the canyon at the Shoshone National Forest edge, the landscape flattens into sagebrush plains.
For a side trip, take WY-133 or WY-135 to explore the Wind River Indian Reservation; with a permit you can fish for trout in the Wind River. Fort Washakie, 14 miles south of Lander, hosts the reservation and the Eastern Shoshone Cultural Center.
Local commerce is small-scale: Shoshoni has a farm supply store, and Lander has a main street with independent bookstores and coffee shops. Outside Lander, the Sinks (a natural limestone cave system) and the Popo Agie Falls are worth the 10-minute detour.
Remember, the route is a gateway to Yellowstone, but there's enough here to stand alone. As the guide on how to find the best stops and hidden gems between cities suggests, slow down to discover these.
Route Logistics and Infrastructure
US-20 west out of Thermopolis is a two-lane highway (WY-789) that becomes Wind River Canyon Scenic Byway. The road is well-maintained, with some twisty mountain sections. In winter, check road conditions: WYDOT's 511 system reports closures and traction laws.
- Fuel: Thermopolis has two gas stations; Lander has several. There's a station in Shoshoni, 26 miles in, with limited hours.
- Road quality: Good pavement, but watch for frost heaves and wildlife (mule deer, elk) near the canyon.
- Speed limits: 65 mph (105 km/h) on open road, 45 mph (72 km/h) in the canyon.
Cell coverage is spotty in Wind River Canyon—download maps ahead. Winter tires or chains may be required after snowfall. Summer thunderstorms bring sudden rain, reducing visibility.
If you need a quick break, Shoshoni has a gas station and convenience store; no major repair shops until Lander.
Continue Your Adventure
Frequently Asked Questions
Is it worth driving Thermopolis, WY to Lander, WY?
Yes, if you enjoy dramatic canyons, hot springs, and quiet Western landscapes. It's a short drive with plenty to see, though it's not a must-do if you're pressed for time.
How long to drive Thermopolis, WY to Lander, WY?
The drive typically takes 1 hour 40 minutes without stops. With stops for sightseeing and meals, allocate half a day.
What are the best stops Thermopolis, WY to Lander, WY?
Top stops include Wind River Canyon, Hot Springs State Park, Boysen Reservoir, Fort Washakie, the Sinks, and Popo Agie Falls. Each offers distinct scenery or culture.
Are there things to do between Thermopolis, WY and Lander, WY?
Yes: soak in the free state bathhouse, hike the canyon's petroglyph trail, fish the Wind River, visit the dinosaur center, or explore the Shoshone cultural sites.
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