Thermopolis to Riverton: A Wyoming Road Trip Guide

The drive between Thermopolis and Riverton covers roughly 60 miles along US-20 and US-26, passing through the Wind River Canyon and the sagebrush plains of central Wyoming. This route offers a compact cross-section of the state's geology and history, from a hot springs resort town to a regional hub on the Wind River Indian Reservation.

One notable detail: the Wind River Canyon, which you'll traverse, is a 1,500-foot-deep gorge carved by the Wind River, and the road passes between ancient rock formations that date back 2.9 billion years. The canyon is also a gateway to the Boysen Reservoir, a popular spot for fishing and boating.

Safety is straightforward: obey the speed limit, watch for wildlife at dawn and dusk, and use pullouts to enjoy the scenery. The canyon has several turnouts for photo ops, and Boysen State Park offers camping and picnicking. For families, the Hot Springs State Park in Thermopolis has a free state bathhouse and a large swimming pool complex, ideal for a break before driving. Pets are allowed at most outdoor areas but not in the bathhouse.

For fatigue management, plan rest stops at Shoshoni (about halfway) and at Boysen Reservoir. The drive is short enough that fatigue is rarely an issue, but a coffee at a local diner in Shoshoni can help. Along the way, you'll pass by the Legend Rock Petroglyph Site, a hidden off-route spot with ancient rock carvings, reachable via a dirt road. Keep in mind that this and other cultural sites are part of the rich heritage of the area, including but not limited to the Wind River Indian Reservation, which is not designated as a UNESCO World Heritage Site but holds significant cultural value.

The route uses US-20 west from Thermopolis, crossing the Wind River canyon and continuing past Boysen Dam, then joining US-26 west at Shoshoni. Road conditions are generally good, with well-paved two-lane highways and minimal traffic. The speed limit is mostly 70 mph, but slows to 55 mph through the canyon and near Shoshoni.

• Cell service is spotty in the canyon but available in the towns.
• There are no major construction zones expected, but check local advisories.

Fuel stops are available in Thermopolis, Shoshoni, and Riverton, but not between Shoshoni and Riverton (about 15 miles). Gas prices tend to be higher in smaller towns, so fill up in Thermopolis or Riverton for better rates. Restrooms are available at the Hot Springs State Park visitors center and at Boysen State Park's marina.

The Wind River Canyon is the scenic centerpiece, with its sheer granite walls and the turquoise waters of the Wind River. The area is also home to wild bighorn sheep that often congregate near the road. Beyond the canyon, the terrain opens into rolling hills dotted with sagebrush, with views of the Owl Creek Mountains to the north and the Wind River Range to the south.

Local commerce along the route is modest: a few small roadside stands selling firewood and local crafts near the canyon, and Shoshoni has a couple of diners and a hardware store. The Wind River Hotel and Casino in Riverton is a significant employer and cultural hub. For a deep dive into hidden stops, check out how to find the best stops and hidden gems between cities.