Coal Bank Pass – Molas Pass loop from Peregrine Parking

If you're looking for a truly challenging road cycling adventure in the San Juan Mountains, the Coal Bank Pass – Molas Pass loop from Peregrine Parking is a difficult 29.7-mile (47.8 km) route that packs in 4287 feet (1307 metres) of climbing, typically taking around 2 hours and 57 minutes. This ride is for experienced cyclists ready to tackle significant elevation at high altitude, offering immense rewards for your effort.

What to expect on Coal Bank Pass – Molas Pass loop from Peregrine Parking

This loop primarily follows US Highway 550, famously known as the Million Dollar Highway, through the 'American Alps'. While the immediate summit of Coal Bank Pass is tree-lined, the climb to Molas Pass opens up to reveal expansive mountain views and a vast mountain meadow area, especially beautiful with wildflowers in mid-summer. Expect sustained climbs with grades often hitting 5-8%, particularly on the ascent to Coal Bank Pass and the final push to Molas Pass. This is a tough ride, best suited for experienced cyclists with strong physical conditioning who are prepared for high-altitude efforts.

Planning your visit

The weather in the San Juan Mountains can change rapidly, so always carry appropriate wet and cold weather gear, even in summer. There are no services between Durango Mountain Ski area and Silverton, so you'll need to be self-sufficient and carry adequate water and food for the duration of your ride. The route is considered one of Colorado's 'must do' road cycling routes, but be aware that some sections of the Million Dollar Highway lack shoulders or guardrails, requiring extra caution. The best time to cycle is typically mid-summer for wildflowers and more stable weather, but always check conditions before you go.

• Distance: 29.7 miles (47.8 km)
• Elevation gain: 4287 feet (1307 metres)
• Difficulty: difficult
• Estimated time: 2 hours and 57 minutes