Dirty Copper Triangle

The Dirty Copper Triangle typically starts and ends near Copper Mountain, Colorado. Specific parking areas can vary, but many riders begin from the Copper Mountain resort area. It's advisable to check local signage or resort information for designated mountain bike parking. Arriving early is often recommended, especially on weekends, to secure a spot.

While dogs are generally allowed on many trails in the White River National Forest, specific regulations may apply to certain sections of this route, especially those that traverse wilderness areas or are heavily used by horses. It's crucial to keep dogs on a leash at all times to protect wildlife and ensure the safety of other trail users. Always pack out all waste.

The best time to ride the Dirty Copper Triangle is typically from late June or early July through September, after the snow has melted from the high passes. Autumn rides, particularly in late September, offer stunning aspen colors, but be prepared for colder temperatures and the possibility of early season snow. Always check current trail conditions and weather forecasts before heading out, as mountain weather can change rapidly.

The Dirty Copper Triangle is located within the White River National Forest. Generally, there are no specific permits or entrance fees required for day-use mountain biking on the trails themselves. However, some parking areas might require a fee, and certain designated wilderness sections may have specific regulations. Always respect Leave No Trace principles and any posted rules.

The terrain is incredibly diverse and challenging. You'll encounter everything from technical singletrack, especially on the initial ascent via the Colorado Trail, to 4x4 roads, double track, and even paved bike paths on the return. Expect significant stretches above treeline with undulating alpine tundra between Searle Pass and Kokomo Pass descent. Descents can be steep, loose, and technical, and sections like Wilder Gulch may be faint and overgrown with stream crossings.

This route is renowned for its breathtaking scenery. You'll experience expansive views, especially during the 5-6 miles above treeline. The traverse across the alpine tundra between Searle Pass and Kokomo Pass descent offers some of Colorado's best tundra riding. You'll also pass through historic Camp Hale, where the 10th Mountain Division trained, and enjoy stunning views of the Holy Cross Ridgeline.

Yes, the route incorporates significant sections of other well-known trails. You'll ride along portions of the Colorado Trail (including segments 7 and 8), the ADT - Colorado C - Q - Seg 4, and the Tenmile Recpath. Other trails like Guller Creek Trail and Wilder Gulch Trail also form part of this epic loop.

No, the Dirty Copper Triangle is considered an expert-level mountain biking route with an extreme physical rating. The high altitude, substantial climbing (over 5,000 feet), and technical descents make it unsuitable for beginners or even many intermediate riders. Riders should be very fit, experienced with high-alpine conditions, and comfortable with technical terrain.

Given the route's difficulty and remote nature, come prepared. Essential items include plenty of water (there's no reliable water source on the trail), high-energy snacks, navigation tools (GPS device or app with downloaded maps), a repair kit for your bike, extra layers of clothing for rapidly changing weather, rain gear, sun protection, and a first-aid kit. Due to the high altitude, be aware of potential altitude sickness.

The high altitude is a major factor, with all three passes topping out around 12,000 feet. Acclimatize if possible, and be aware of altitude sickness symptoms. The climb up Resolution Mountain Road to Ptarmigan Pass is particularly brutal, with grades over 10%. Some sections, especially below Searle Pass, may require hike-a-bike. Starting early is crucial to avoid afternoon thunderstorms, which are common in the mountains.