Mount Wilson, Sturtevant, and Winter Creek Loop

The primary access point for this loop is Chantry Flats. You'll need a $5 day or $30 annual Adventure Pass for parking. This area can get very busy, especially on weekends, so arriving early is highly recommended to secure a spot.

Yes, a National Forest Adventure Pass is required for parking at Chantry Flats, which is the main trailhead for this loop. This pass helps support the maintenance of recreational facilities in the Angeles National Forest.

Spring and fall generally offer the most pleasant conditions. During these seasons, temperatures are milder, and the risk of scorching heat on exposed sections like 'Cardiac Hill' is lower. While stream crossings might be dry in summer, the heat can be intense. Winter riding is possible, but trail conditions can vary, and some sections might be affected by rain or snow.

This loop offers a challenging and diverse experience. You'll encounter technical singletrack with numerous buried rocks and obstacles, which may require some 'hike-a-bike' sections. There are also steep inclines, multiple switchbacks, and narrow areas with significant exposure. Periodic stream crossings add to the variety, and the ascent up 'Cardiac Hill' on the paved fire road can be very exposed and hot. The Winter Creek Trail section is considered expert-level.

No, this loop is generally considered difficult and is not suitable for beginners. It requires significant endurance, technical skill, and preparedness due to its varied and challenging terrain, steep climbs, technical descents, and substantial elevation changes. The Winter Creek Trail section, in particular, is rated as expert-level.

The route offers diverse scenery and historical points of interest. You'll pass by the picturesque Sturtevant Falls, the historic Mount Wilson Summit Viewpoint with panoramic views, and the Mount Wilson Observatory. Along the Lower Winter Creek Trail, you'll also see numerous historic vacation cabins, many dating back to the 1920s, that are only accessible by trail.

Yes, the route utilizes sections of several other trails. You'll ride portions of the Gabrielino Trail, Silver Moccasin Trail (NRT), Mount Wilson Toll Road, Sturtevant Trail, and Upper Winter Creek Trail, among others.

Dogs are generally allowed on trails within the Angeles National Forest, including this loop, but they must be kept on a leash. Always ensure your dog is well-behaved around other trail users, especially given the heavy hiker traffic on this route.

This loop is heavily traveled by hikers, especially on weekends. As a mountain biker, it's crucial to practice proper trail etiquette: always yield to hikers, announce your presence clearly and early, and maintain a safe speed. Be prepared to dismount and walk your bike in crowded or technical sections.

The Chantrey Flats area at the trailhead offers some facilities. However, once on the trail, reliable water sources are limited. It's essential to carry sufficient water for the entire duration of this challenging ride, especially during warmer months. There are no specific facilities like restrooms or stores directly on the loop itself.

This loop stands out for its blend of challenging technical terrain, significant elevation changes, and rich historical and natural scenery. It combines demanding singletrack, a strenuous paved climb, and rewarding views from Mount Wilson Summit Viewpoint and the Mount Wilson Observatory, alongside the unique historical cabins along Winter Creek Trail. It's a true test of skill and endurance with a diverse payoff.