Mountainbike loop from Marinwood

If you're looking for a solid mountain biking workout with expansive views in Marin County, the Mountainbike loop from Marinwood delivers. This moderate 8.8-mile (14.1 km) route packs in 1199 feet (365 metres) of elevation gain, taking about 1 hour and 25 minutes to complete, making it a great option for intermediate riders seeking a rewarding challenge without committing to an all-day epic.

What to expect on Mountainbike loop from Marinwood

This loop offers a diverse ride through rolling hills, open meadows, and varied oak woodlands. You'll encounter a mix of singletrack sections, like the fun and flowing Big Rock Trail, and wider fire roads. Be prepared for some serious climbing, especially on the Luiz Fire Road, which can hit grades over 20% and might have you pushing your bike. The reward for your effort comes at the cell phone towers on Big Rock Ridge, where you can soak in nearly 360-degree panoramic views stretching to San Francisco, Mt. Diablo, and even Tomales Bay on a clear day. This route is best for riders with strong climbing skills who appreciate varied terrain and stunning vistas.

Planning your visit

The Lucas Valley-Marinwood area is generally accessible, but strong climbing skills are beneficial for this route. While the trail is rated moderate, the steep sections require good fitness. Parking for Marinwood mountain biking trails is typically available near trailheads in the area. Spring is a particularly beautiful time to visit, as the meadows burst with poppies. Always carry enough water, especially on warmer days, as the exposed sections can get hot.

Trail details

• Distance: 8.8 miles (14.1 km)
• Elevation gain: 1199 feet (365 metres)
• Difficulty: moderate
• Estimated time: 1 hours and 25 minutes