Old Finley Road, Sulphur Springs Trail, and Black Hills Trail Loop

The loop officially starts near the East Oyster Pt Trailhead. You can typically find parking near the entrance to Morgan Territory Regional Preserve. The Morgan Territory Regional Preserve SW-gate is also a key access point for this area.

This hike is rated as moderate. While some sections involve a steady, and at times steep, ascent, it is generally considered a non-technical fire road. Hikers should be prepared for an elevation gain of approximately 474 meters over 16.7 kilometers. It's manageable for those with a reasonable level of fitness.

The terrain varies significantly. You'll encounter old dirt roads, shaded forested areas along Tassajara Creek, and open, grass-covered hillsides. Some sections can be sandy and loose, while others might be muddy, especially after rain. The trail transitions from sheltered areas to more exposed ridges.

Spring and fall are generally the best seasons. In spring, the hills are green, and wildflowers bloom. Fall offers cooler temperatures. During warmer months, especially summer, many sections of the trail lack shade and can become very hot, making early morning hikes advisable.

Yes, dogs are generally allowed on leash within Morgan Territory Regional Preserve, which encompasses much of this route. Always check the latest park regulations before you go to ensure compliance.

Morgan Territory Regional Preserve typically does not charge an entrance fee. However, it's always a good idea to check the official East Bay Regional Park District website for any updated regulations or specific permit requirements for group activities.

As you ascend, you'll be rewarded with panoramic views to the north and south from the ridge. Vistas of Riggs Canyon and the eastern side of Mount Diablo State Park are notable. The trail also transitions through varied environments, from creek-side forests to open hillsides.

Yes, this route incorporates sections of several other trails. It covers parts of the Diablo Regional Trail (35%), the local Black Hills Trail (28%), and the Sulphur Springs Trail (27% and 24%). It also briefly touches the Jeremiah Trail (18%), offering connections to a wider network within the preserve.

No, the 'Black Hills Trail' referenced in this loop is a local trail within the Morgan Territory Regional Preserve area in California. It is not related to the Black Hills region in South Dakota, which is a geographically distinct area with its own extensive trail network.

Given the moderate difficulty and potential exposure, bring plenty of water, especially on warmer days. Sturdy hiking shoes are recommended for the varied terrain. Sun protection (hat, sunscreen) is essential for exposed sections, and layers are advisable for changing temperatures.

As part of a regional preserve, the area offers potential for wildlife sightings. Keep an eye out for deer, various bird species, and smaller mammals. Always observe wildlife from a distance and do not disturb their natural habitat.