Donner Canyon Road & Back Creek Trail Access

Embark on the Mount Olympia and North Peak Loop, a challenging hike that spans 11.9 miles (19.1 km) and climbs a significant 3206 feet (977 metres). This difficult route takes approximately 6 hours and 31 minutes to complete, offering a rewarding journey through varied landscapes. As you ascend, you'll traverse serpentine grasslands and blue oak woodlands, with creeks winding their way towards Mount Diablo Creek. The true highlight awaits at the summits of Mount Olympia and North Peak, where you'll be treated to expansive panoramic views of the surrounding bays, rivers, and cities. Keep an eye out for Donner Creek Falls along the way, adding another scenic element to your adventure.

When planning your visit, be aware that this route features very steep sections, some with loose gravel, making supportive shoes with good traction essential. After rainfall, the trail can become quite slippery, so exercise caution. Much of the North Peak Trail is highly exposed to the sun, so bring ample water, especially during warmer seasons. Starting your hike early can help you avoid the midday heat and potentially spot wildlife like turkeys and coyotes.

This loop is nestled within Mount Diablo State Park, an area renowned for its diverse ecosystems and geological formations. The trail itself showcases a transition from open grasslands to dense woodlands, providing a rich habitat for local wildlife. The exceptional panoramic views from the peaks are a testament to the region's unique topography, allowing you to see far beyond the immediate surroundings. It's a demanding yet deeply immersive experience that highlights the natural beauty of the Diablo Range.

Prepare for a challenging hike on the Back Creek Trail and Bald Ridge Trail to Mount Diablo Summit. This difficult route covers 5.8 miles (9.4 km) and demands a significant climb of 3210 feet (978 metres), typically taking about 3 hours and 32 minutes to complete. As you ascend, the landscape transforms from peaceful oak woodlands to open scrubland, offering expansive views of Clayton, Concord, and Walnut Creek. You will navigate rocky and gravelly sections, including steep singletrack, leading to dramatic vistas across the Bay Area and Central Valley. Keep an eye out for the striking Devil's Pulpit viewpoint before you reach the panoramic summit.

This hike is considered strenuous, so make sure you are in good physical condition and consider training in advance. Trekking poles are highly recommended to help you navigate the steep and technical sections of the trail. It is best to avoid hiking during summer months when temperatures can climb above 85°F, as the extreme heat and limited shade can make the ascent very difficult. Always carry at least 3 liters of water to stay hydrated throughout your journey.

On a clear day from Mount Diablo Summit, you can see for hundreds of miles, a truly remarkable reward for your effort. The trail offers a direct path from the base to this iconic peak, showcasing a shift in scenery as you gain elevation. In spring, the rugged landscape comes alive with vibrant wildflowers, adding a splash of color to your journey.

Embark on the Back Creek and Donner Canyon Loop, a moderate 5.9-mile (9.6 km) hike that climbs 1770 feet (539 metres) and typically takes about 3 hours and 22 minutes. You'll experience a varied landscape, moving from open rolling grasslands into steep canyons. The route winds through dense forests of oak, pine, and cedar, offering a diverse and engaging outdoor experience. Keep an eye out for views of Mount Diablo's summit and North Peak as you ascend, and after winter rains, the Falls Trail transforms into a series of spectacular cascades.

Plan your visit during winter and early spring to see the creeks flowing and wildflowers in bloom. Be prepared for potentially muddy conditions in the lower parts of Donner Canyon if you hike after rain. This trail is located on Mount Diablo's northeastern slopes, and you should note that dogs are not allowed on any trails within Mount Diablo State Park. Check local conditions before heading out to ensure a pleasant trip.

This loop is notable for its dynamic scenery, which changes significantly with the seasons. The transformation of the Falls Trail into a series of cascades after winter rains is a unique feature that sets it apart. Beyond the diverse flora, the trail provides a great opportunity to explore the varied ecosystems of Mount Diablo State Park, making it a rewarding choice for hikers seeking both challenge and natural beauty.