Seaview and Big Springs Trail Loop

The loop offers diverse terrain, including rocky sections, fire roads, and singletrack paths. You'll jog through wooded areas with eucalyptus and pine groves, as well as open hillsides and meadows. Some parts are shaded, while others are more exposed to the sun. Be mindful of rocky patches, especially on descents.

You'll be treated to stunning panoramic views throughout the loop. On clear days, these include sweeping vistas of the San Francisco skyline, the Bay, the Golden Gate Bridge, Mt. Tamalpais, and the San Pablo and Briones Reservoirs, and even Mt. Diablo. You'll also see the beauty of Wildcat Canyon and the East Bay hills.

While considered 'moderate' for hiking, this loop presents a good physical challenge for jogging. It has significant uphill climbs and rocky sections that require careful footing. It's rated 'Intermediate' overall and 'Hard' for physical demands for runners, so it might be challenging for absolute beginners.

A common starting point for this loop is the Quarry Picnic Site within Tilden Regional Park, which offers parking. You can also access the trail from the Nimitz Way Trailhead, which has its own parking facilities.

Yes, the Seaview and Big Springs Trail Loop is dog-friendly. Dogs are generally allowed off-leash in most areas within Tilden Regional Park, but always be sure to check local signage for specific regulations.

No, there are typically no entrance fees or permits required to access Tilden Regional Park or its trails, including the Seaview and Big Springs Trail Loop. It's part of the East Bay Regional Park District, which generally offers free access.

Spring and fall generally offer the most pleasant conditions with milder temperatures and often clearer views. Spring also brings wildflowers. Summer can be hot and exposed in sections, while winter might bring rain, making some parts muddy or slippery. Always check the weather forecast before you go.

Beyond the stunning views, you'll pass by the Nimitz Way Trailhead, sections of the Seaview Trail, and reach the Lomas Cantadas summit, offering expansive vistas. The trail also winds through diverse landscapes, including burned-out tree forests and meadows.

Yes, the route intersects with several other trails. Significant portions of the loop follow the Bay Area Ridge Trail - 02 - East Bay and the East Bay Skyline National Recreation Trail. You'll also find sections that are part of the Mokelumne Coast to Crest Trail, Seaview Trail, and Lower Big Springs Trail.

Yes, Tilden Regional Park offers amenities. The Quarry Picnic Site, a common starting point, has picnic areas and restrooms. It's always a good idea to carry enough water for your jog, especially on warmer days, as water sources might not be consistently available directly on the trail.

Keep an eye out for various wildlife. You might spot hawks, deer, turkey vultures, and lizards. The diverse habitats along the trail, from wooded areas to open meadows, support a range of species.