Aspen to Afton Road Trip Guide: Mountains to Wyoming

The road from Aspen, Colorado to Afton, Wyoming is a 335-mile journey that traverses the Rocky Mountains and the high desert of Wyoming. The route primarily follows Highway 82 north to I-70 west, then US-191 north through the heart of the Flaming Gorge National Recreation Area. A lesser-known fact: the section of US-191 between Rock Springs and Farson is one of the flattest, straightest highways in the western US, a stark contrast to the winding mountain passes earlier in the trip. Estimated driving time is 6.5 hours without stops, but most travelers stretch it to a full day to enjoy the scenery.

For a more detailed strategy on how to find the best stops and hidden gems between cities, check out this guide: how to find the best stops and hidden gems between cities.

Safety concerns include wildlife crossings (deer and antelope) on US-191 between Rock Springs and Farson, especially at dawn and dusk. The speed limit is 65-70 mph, but whiteouts and strong crosswinds can occur in winter. For families, the best stop is the Bunning Park in Rock Springs, which has a children's playground and picnic areas.

• Pet-friendly: Many rest areas have designated pet walks. Ensure your pet has water, as Wyoming is arid and hot in summer.
• Fatigue management: The stretch from Rock Springs to Afton is monotonous. Plan a stop at the 'Farson Mercantile' or the 'Little America' rest area (20 miles west of Rock Springs) for coffee and a stretch.
• Infrastructure safety: The route has limited cell service after leaving Rock Springs until arriving in Afton. Download offline maps.

The drive begins in the rugged Elk Mountains near Aspen, with views of the Maroon Bells. As you descend into Glenwood Springs, the landscape opens into the Colorado River Valley. Farther north, the route crosses the Continental Divide at Rabbit Ears Pass and descends into the high plains of Wyoming.

• Natural highlight: Flaming Gorge National Recreation Area. The red rock canyon walls and the 500-foot-deep gorge are stunning—stop at the Flaming Gorge Dam Visitor Center.
• Local commerce: In Rock Springs, visit the downtown district for local art galleries and the Rock Springs Historical Museum. The city's economy is driven by energy (coal and gas) and tourism.
• Hidden gem: The town of Farson is famous for its ice cream shop, Farson Mercantile, which serves huge portions—a perfect mid-route treat.

Fuel stations are sparse between Rawlins and Farson, so fill up in Rock Springs. The route passes through two time zones: Mountain Time in Colorado and central Wyoming, then switches to Mountain Time in Afton (Wyoming is mostly Mountain Time, but a small strip near the Idaho border uses Mountain or sometimes observes daylight saving differently).

• Best fuel stop: Rock Springs has numerous stations with reasonable prices. Avoid the small station in Farson if possible; it's often $0.50/gallon more expensive.
• Road conditions: I-70 is well-maintained, but US-191 north of Rock Springs can have construction in summer. Check Wyoming DOT alerts.
• Restrooms: Most fuel stations are open 24/7. Rest areas are located near Little America (I-80) and in Farson.