Estes Park to Thermopolis: A Colorado-Wyoming Road Trip Guide

This route traces part of the old Cherokee Trail, a 19th-century emigrant path used by gold seekers and pioneers. Today, US-287 and WY-789 connect Estes Park, CO to Thermopolis, WY over a 350-mile journey that climbs through the Medicine Bow Mountains and descends into Wyoming’s Bighorn Basin.

Estes Park sits at 7,522 feet; Thermopolis at 4,330 feet. The drive takes roughly 5.5 to 6 hours without stops, but you’ll want to budget at least 8 hours to explore.

How long to drive Estes Park, CO to Thermopolis, WY without breaks? 5.5 hours, but plan for rest every 2 hours. The sheer monotony of the Wyoming plains can cause drowsiness.

Is it worth driving Estes Park, CO to Thermopolis, WY? Absolutely, for the hot springs and dinosaur sites. However, ensure your vehicle is in good shape; services are sparse.

• Family stops: Laramie’s Terry Bison Ranch offers train rides and animal feeding. Thermopolis’s Hot Springs State Park has a water playground.
• Pet-friendly: Many motels in Rawlins and Thermopolis accept pets; the state park allows leashed dogs around the grounds but not in pools.
• Hidden off-route spots: The Saratoga Hot Springs (40 minutes west of Rawlins) are free and uncrowded.

Discover more tips on how to find the best stops and hidden gems between cities.

US-36 west from Estes Park joins US-287 near Loveland. You’ll continue north on US-287 through the Colorado foothills into Wyoming. After Laramie, US-287 merges with I-80 west to Rawlins, then you take US-287 north (now WY-789) through Muddy Gap to Thermopolis.

The route is two-lane highway for long stretches with occasional passing lanes. Watch for wildlife near dawn and dusk.

• Fuel stops: Loveland (CO), Laramie, Rawlins, Jeffrey City (limited), and Thermopolis. Fill up at Rawlins; the next reliable station is 120 miles north.
• Cell coverage: Patchy between Rawlins and Thermopolis; download maps ahead.
• Road conditions: Check COtrip and WYDOT for winter closures.

The drive offers a dramatic transition from the Colorado Rockies to the high plains of Wyoming. The Medicine Bow National Forest provides dense pine forests near Laramie, while the Red Desert near Rawlins showcases sagebrush and petrified wood.

Thermopolis is home to the world’s largest mineral hot spring, the Hot Springs State Park. Bison roam the grounds, and the state-run bathhouse offers free admission. Nearby, the Wyoming Dinosaur Center displays fossils from the Jurassic period.

• Best stops Estes Park, CO to Thermopolis, WY: Medicine Bow National Forest, the Ames Monument (highest point on the original transcontinental railroad), and the historic Virginian Hotel in Medicine Bow.
• Things to do between Estes Park, CO and Thermopolis, WY: Visit the Wyoming Frontier Prison in Rawlins, or hike the Red Gulch Dinosaur Tracksite near Shell.
• Local commerce: Rawlins has a coal-mining history; Thermopolis relies on tourism and agriculture.