Back Creek and Donner Canyon Loop

Parking for this loop is typically available at the Donner Canyon trailhead, which serves as a common access point for trails on Mount Diablo's northeastern slopes. Arriving early, especially on weekends, is advisable as parking can fill up.

No, dogs are not allowed on the trails within Mount Diablo State Park, which includes the Back Creek and Donner Canyon Loop.

The best time to hike this loop is during the winter and early spring. This is when the creeks are flowing, creating impressive waterfalls, and wildflowers are in bloom. Be prepared for potentially muddy conditions in the lower parts of Donner Canyon after rain.

As this trail is located within Mount Diablo State Park, standard park entrance fees apply. You may need to pay a day-use fee at the park entrance. No specific hiking permits are required for the trail itself.

The loop offers diverse terrain, transitioning from rolling grasslands to steep canyons and dense forests of oak, buckeye, pine, and cedar. As you gain elevation, the vegetation shifts to chaparral. You'll experience bubbling creeks, fascinating rock formations, and lush sections, especially along the Hetherington Loop trail.

Yes, a significant highlight of this loop, particularly after winter rains, is the presence of numerous waterfalls along the Falls Trail. You'll walk alongside and even cross streams, with opportunities to view both close-up and distant cascades.

You might encounter noisy turkeys, butterflies, hummingbirds, and bees. Tarantulas can sometimes be spotted in the chaparral sections of Donner Canyon during early morning or late afternoon. Deer and snakes are also present in the grasslands. In spring, the trail explodes with wildflowers like Ithuriel's spear, Blue Dicks, sticky monkey flower, yellow globe lilies, and California poppies.

Key highlights include the Donner Canyon Road & Back Creek Trail Access, which serves as a gateway to the loop's diverse ecosystems. You'll also find a scenic View of Donner Canyon, and after rains, numerous waterfalls along the Falls Trail. Intriguing rock formations are also a notable feature.

Yes, the route intersects with several other paths. You'll find yourself on sections of the Falls Trail Loop, the ADT - California - T - Seg 7, the Mokelumne Coast to Crest Trail, the Back Creek Trail, and Meridian Ridge Road, offering a varied hiking experience.

While the initial mile of some routes can be relatively flat and suitable for children, the trail quickly becomes steeper. Overall, the Back Creek and Donner Canyon Loop is considered a moderate hike with steep climbs in sections. The Falls Trail can be slippery and steep, especially after rain, and includes stream crossings and drop-offs, making it less ideal for very young children or absolute beginners.

After significant rainfall, expect muddy conditions in the lower parts of Donner Canyon. The Falls Trail, in particular, can become slippery and steep, requiring careful footing due to stream crossings and potential drop-offs. Always wear appropriate footwear and be prepared for wet conditions during the rainy season.

Yes, as you ascend certain sections of the loop, you'll be treated to rewarding views. These include panoramic vistas of Donner Canyon, and from higher points, you can catch glimpses of Mount Diablo's summit and North Peak.