The Iron Horse Bicycle Classic: Durango's Legendary Race

Every Memorial Day weekend, cyclists race the Durango & Silverton Narrow Gauge Railroad from Durango to Silverton. Bikes versus a steam-powered train. 47 miles. 5,700 feet of climbing over two 10,000-foot mountain passes. It's been running for nearly 50 years, and it's one of the most iconic cycling events in Colorado.

The Race

The main event — officially called the Iron Horse Bicycle Classic road race — goes from Durango to Silverton over Coal Bank Pass (10,640 feet) and Molas Pass (10,910 feet). These are two of the biggest, most beautiful climbs on US-550 (the Million Dollar Highway). Pros finish in about two hours. Most mortals take three to four. The train takes about three and a half hours, so the race is genuinely competitive for strong riders.

The challenge is real. You're climbing nearly 6,000 vertical feet at high altitude, and the passes are no joke — steep grades, switchbacks, and thin air. But the scenery is absurd. The road follows the Animas River through a canyon, climbs through pine forests and alpine meadows, and tops out above treeline with views of the San Juan Mountains in every direction.

For many riders, beating the train is the goal. For others, just finishing is the accomplishment. Either way, crossing the finish line in Silverton — a historic mining town at 9,300 feet — feels like a legitimate victory.

The Weekend Events

The Iron Horse isn't just for elite road racers. The weekend includes something for everyone:

Citizens' Tour: A non-competitive version of the main race. Same route, same distance, same climbs — just without the pressure of racing. Ride at your own pace and enjoy the mountains.
Quarter Horse Ride: A shorter 25-mile route from Durango to Purgatory Resort. Less climbing, still beautiful, and much more accessible for recreational riders.
Pedal Assist Quarter Horse: Same 25-mile route but e-bikes are allowed. This opens the ride to people who want the experience without the full physical grind.
Mountain Bike Race: Off-road racing on Durango's legendary singletrack trails. Fast, technical, and muddy if it's rained.
Kids Race: A short race for young riders. The future generation of Iron Horse racers starts here.
BMX Straight Rhythm: A BMX race event that brings high-speed action and big air to downtown Durango.
La Strada La Plata Gravel Ride: A gravel grinding event through the La Plata Mountains. Gravel bikes and mixed terrain — the perfect blend of road and mountain biking.

The whole weekend turns Durango into a cycling festival. Over 3,500 participants and thousands of spectators converge on a town of 16,000. It's chaotic, festive, and one of the best weekends of the year to be in Durango.

The Vibe

Memorial Day weekend during Iron Horse has an energy that's hard to describe. Downtown Durango is packed with cyclists, families, vendors, food trucks, and beer tents. Restaurants are full. The breweries (Ska, Steamworks, Carver) are overflowing with post-race celebrations. There's live music, award ceremonies, and a general sense that everyone is here for the same reason — to celebrate cycling and the mountains.

It also marks the unofficial start of summer. Trails are opening, the Animas River is running high with snowmelt, and the days are long and warm. The energy shifts from ski season to bike season, and the town embraces it.

Watching the Race

You don't have to ride to enjoy Iron Horse. Spectating is a legitimate experience. The best viewing spots are:

Top of Coal Bank Pass: Watch riders grind up the switchbacks with massive vertical drops and mountain views behind them. It's dramatic and makes for great photos.
Top of Molas Pass: Similar vibe, slightly higher elevation. The views here are some of the best in Colorado.
Silverton Finish Line: The finish line atmosphere is electric. Riders roll in exhausted, elated, and surrounded by cheering crowds. The entire town of Silverton turns into a party.

Bring layers — it can be 70°F at the Durango start line and 40°F at the top of Molas Pass. Pack snacks, water, and sunscreen. And get there early — parking fills up fast at the pass viewpoints.

History and Tradition

The Iron Horse Bicycle Classic has been running since 1972, making it one of Colorado's oldest cycling traditions. The race was born from a simple challenge: can a cyclist beat a steam train over mountain passes? The answer turned out to be yes (at least for the fast ones), and a legend was born.

The event has grown from a small local race to a major cycling festival that draws riders from across the country. But it's retained its grassroots, community-driven feel. This isn't a corporate event — it's a Durango tradition run by locals who love cycling and want to share it with everyone.

Planning Your Trip

If you're planning to ride, register early — the main race and citizens' tour sell out. Book lodging months in advance because Memorial Day weekend is peak demand in Durango. And train for the altitude — if you're coming from sea level, those passes will humble you.

Our townhome Basecamp (110 Door2Lift) sleeps eight, has a hot tub and pool table, and is right across from Purgatory Resort with a free shuttle. It's the perfect base for a group of riders looking to experience Iron Horse and explore Durango's trails and breweries.

Planning a trip to Purgatory? Check availability at purgatoryunlocked.com

Planning a trip to Purgatory? Check availability and book direct — save 10-15% vs Airbnb/VRBO.