The best MTB trails around Marin City

The Mount Tamalpais & Coastal Trail loop offers a truly diverse mountain biking experience, guiding you through cool redwood forests, sun-dappled oak woodlands, and expansive open grasslands. As you climb, you'll be treated to breathtaking panoramic views of the Pacific Ocean and the San Francisco Bay Area, with the descent along the Coast View Trail providing particularly memorable vistas.

This moderate 22.0-mile (35.4 km) route involves a substantial 2755 feet (840 metres) of elevation gain, typically taking around 3 hours and 19 minutes to complete. The terrain varies from challenging fire road climbs with grades up to 12% to thrilling single-track descents, so you'll need good fitness and solid riding skills. Plan to start early to make the most of the daylight and avoid potential crowds, especially on weekends.

Mount Tamalpais is historically significant as the birthplace of modern mountain biking, making this loop a ride through history as much as through nature. The park's extensive trail network provides a mix of challenges and scenic rewards, attracting riders from all over. While the route is generally considered moderate, it can be modified for more technical challenges, offering something for many skill levels.

The Miwok, Coastal, and Dias Ridge Loop delivers a comprehensive mountain biking experience, weaving through open grasslands, chaparral, and dense eucalyptus groves. You'll be treated to spectacular ocean views, especially along the Dias Ridge Trail, which offers sweeping vistas of Muir Beach and the Pacific. The route combines challenging technical singletrack on the Miwok Trail with smoother, wider paths, providing a constantly changing backdrop of the Marin Headlands.

This moderate 10.9-mile (17.6 km) loop involves a substantial 1877 feet (572 metres) of elevation gain, typically taking just under two hours. While the Miwok Trail features technical climbs with deep ruts and steep grades, the Dias Ridge Trail offers more forgiving, wide singletrack with nice switchbacks. It's best suited for intermediate riders looking for a good workout and diverse terrain, rather than beginners.

Beyond the riding, the trail passes through Mount Tamalpais State Park and Golden Gate National Recreation Area lands, offering chances to see local wildlife and wildflowers in season. The Dias Ridge Trail, built on former dairy ranch land, descends towards Muir Beach, providing a potential rest stop. This loop stands out in Marin County for its significant proportion of singletrack and consistent, breathtaking ocean vistas.

The Tennessee Valley/Muir Beach loop offers a truly diverse mountain biking experience, taking you from the valley floor to coastal ridges with stunning ocean vistas. You'll navigate a mix of singletrack and fire roads, passing by the unique Green Gulch Zen Center Farm and enjoying views of Mt. Tamalpais and Muir Beach. Expect varied terrain, from flowy sections to rocky, technical stretches, all set against the dramatic backdrop of the Marin Headlands.

This is a difficult 20.2-mile (32.4 km) mountain bike route with a substantial 3196 feet (974 metres) of elevation gain, typically taking around 3 hours and 26 minutes to complete. The climbs are steep and challenging, particularly on trails like Miwok and Middle Green Gulch, but the panoramic views from the Coastal View Trail make the effort well worth it. Plan your visit between March and May to catch the vibrant wildflowers.

What makes this loop stand out is its combination of incredibly diverse landscapes and a challenging, engaging ride. You'll experience the transition from lush valleys to open grasslands and dramatic coastal scrub, with the chance to spot wildlife like red-tailed hawks and coyotes. The blend of demanding climbs and fun, jumpy descents against a backdrop of iconic Pacific Ocean views makes this a standout mountain biking destination.

The Marincello, Bobcat, Miwok and Old Springs Loop offers a dynamic mountain biking experience through the Marin Headlands, blending challenging climbs with thrilling descents. You'll traverse well-maintained fire roads and technical singletrack, all while soaking in incredible viewpoints of the Pacific Ocean, Golden Gate Bridge, and surrounding North Bay landscape. The route provides a fantastic mix of terrain, from the gradual ascent of Marincello to the rutted sections of Miwok and the unique features of Old Springs, making for an engaging ride.

This moderate 7.2-mile (11.5 km) loop involves 1305 feet (398 metres) of elevation gain and typically takes about 1 hour and 19 minutes. The trailhead is conveniently located at the Tennessee Valley parking lot, though it can fill up quickly on weekends. Be aware that the Old Springs Trail is undergoing maintenance until early August 2026, which might affect the full loop. This route is best suited for strong beginners or intermediate riders looking for a varied challenge.

What makes this loop stand out among popular trails in Marin County is its blend of accessibility and technical sections, offering something for many skill levels. The Marincello Trail itself has an interesting history, being a repurposed access road from an abandoned development, which explains its consistent grade. Remember to share the trail respectfully with hikers and horses, slowing down when passing.