Washington Gulch Trailhead

Get ready for a challenging mountain biking adventure on the 403 Trail loop. This difficult route spans 12.6 miles (20.3 km) and demands a significant climb of 2479 feet (755 metres), typically taking around 2 hours and 28 minutes to complete. As you ride, you will experience a high-alpine environment, often above 11,000 feet, with demanding downhill sections that test your skills. Look forward to expansive vistas of the Elk Mountains and the Crested Butte valley, especially from the Mt. Avery Viewpoint. The trail winds through lush, flower-filled hillsides, particularly vibrant in July and August, and offers shade in aspen forests.

When planning your trip, aim for July or August to avoid snow crossings, which can linger on north-facing slopes earlier in the season. This mountain biking route is rated as difficult, so it is best suited for experienced riders comfortable with technical sections. Always check local conditions before heading out to ensure the trail is open and safe for riding. Be prepared for high-alpine weather changes, even in summer. Carry enough water and supplies, as services are limited once you are on the trail.

The 403 Trail loop is a standout in Gunnison National Forest, known for its high-alpine terrain and the stunning natural beauty of the Elk Mountains. You will find yourself immersed in a diverse ecosystem, from dense aspen groves to open meadows bursting with wildflowers. The route's elevation profile and technical demands make it a true test of endurance and skill for mountain bikers. This trail offers a unique opportunity to experience the rugged grandeur of the Colorado Rockies.