Stewartville and Ridge Trail Loop

The average mountain biker can expect to complete this 13.4 km loop in approximately 1 hour and 30 minutes. However, this can vary based on your fitness level and how often you stop to enjoy the views or tackle challenging sections.

While some sections might feel approachable, this loop is generally considered moderate to strenuous due to significant elevation changes and very steep climbs. Notably, 'The Wall' features grades exceeding 20%. Beginners might find parts of it very challenging and may need to walk their bikes on the steepest ascents. It's best suited for riders with some experience.

You'll ride on a mix of unpaved trails and dirt fire roads, with some gravelly sections. Expect significant elevation changes, including both gradual and steep climbs, as well as 'roller-coaster' ridge-top fire roads and twisty downhill sections. After wet weather, some areas can be muddy and uneven due to cattle activity.

The trail offers spectacular panoramic views of Mount Diablo, the Sacramento–San Joaquin Delta, and the towns of Antioch and Brentwood. You'll also pass through an oak-studded valley and can see Rose Hill Cemetery in the distance. A defining feature is 'The Wall,' a particularly steep climb. The route also traverses the historically rich Black Diamond Mines Regional Preserve, connecting former mining towns.

Yes, the route utilizes sections of several official trails, including the Stewartville Trail, Ridge Trail, and Carbondale Trail. It also briefly intersects with the ADT - California - T - Seg 7, River View Trail, and Miner's trail, offering opportunities for extended rides within the preserve.

The trail is located within the Black Diamond Mines Regional Preserve. You can typically find parking at the preserve's designated trailheads. Specific parking areas are usually well-marked upon entry to the preserve.

Yes, as the trail is located within the Black Diamond Mines Regional Preserve, there may be an entrance fee or parking fee required by the East Bay Regional Park District. It's advisable to check the official park website for the most current fee information before your visit.

Dogs are generally allowed in the Black Diamond Mines Regional Preserve, but they must be kept on a leash at all times. Please remember to clean up after your pet to help maintain the preserve's natural beauty.

Due to its exposed nature and demanding uphill sections, the Stewartville and Ridge Trail Loop is best ridden in cooler weather. Spring and fall offer pleasant temperatures, while winter can also be good, though you might encounter muddy conditions after rain. Summers can be very hot, making the strenuous climbs even more challenging.

You are very likely to encounter numerous cows grazing in the preserve, which can sometimes affect trail conditions. Beyond cattle, the preserve is home to various other wildlife, though they may be more elusive.

Many riders find the initial climb on the Stewartville Trail, especially the section leading to the Stewartville to Ridge Trail climb, to be quite demanding. To make the most of your ride, consider starting early in the morning, especially during warmer months, to avoid the heat and potentially fewer people on the trail. Also, be prepared for 'The Wall' – it's a significant challenge that often requires a strong effort or a brief walk.