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May 19, 2025
Mountain biking
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Nearby routes
Best routes near Point Ridge Trail Junction Viewpoint
4.8
(6)
33
riders
35.3km
03:51
1,150m
1,150m
The 680 Trail – Big Rock Ridge loop from Sleepy Hollow is a challenging mountain bike ride that delivers big on views and varied terrain. You'll navigate everything from flowing singletrack on the 680 Trail to incredibly steep fire roads on Big Rock Ridge, where grades can exceed 20%. The reward for your effort is spectacular, with panoramic vistas stretching across the Bay Area, including Mount Tamalpais and the Golden Gate Bridge, especially from the exposed grasslands of Big Rock Ridge.
This difficult 21.9-mile (35.3 km) route involves a substantial 3784 feet (1153 metres) of elevation gain and typically takes around 3 hours and 50 minutes to complete. It's designed for advanced riders with very good fitness. While the 680 Trail itself is relatively easy, the strenuous climbs on Big Rock Ridge mean you should be prepared for a demanding workout. Spring is a great time to visit for wildflowers, though summer fog can add a dramatic touch.
This loop connects the Terra Linda-Sleepy Hollow Divide Open Space Preserve and the Loma Alta Open Space Preserve, offering a rare opportunity for wooded singletrack in Marin County's open space system. The 2.5-mile Big Rock Trail singletrack descent is particularly prized by local mountain bikers for its flowing character. It's a true hidden gem for those seeking top-rated mountain biking trails near Sleepy Hollow.
4.8
(5)
29
riders
43.3km
04:46
1,450m
1,450m
The Big Rock Ridge – 680 Trail loop offers a truly epic mountain biking experience, taking you from shaded lower sections to the exposed, grassy upper reaches of Marin County's second-tallest peak. As you climb, the landscape transforms, opening up to continuous, sweeping views that stretch across the Bay Area, encompassing landmarks like Mount Tamalpais and the distant Pacific Ocean. This route combines flowing singletrack with grueling fire road ascents, providing a diverse and demanding ride.
This is a difficult mountain biking route, covering 26.9 miles (43.3 km) with a substantial 4760 feet (1451 metres) of elevation gain, typically taking around 4 hours and 45 minutes. You'll need very good fitness and advanced riding skills to tackle the steep grades, some of which can exceed 20%. Plan to start early, especially on warmer days, and ensure you carry ample water for this challenging and exposed journey.
What makes this loop particularly notable is its blend of trail types and the sheer scale of its panoramic rewards. The 2.5-mile Big Rock Trail singletrack is considered a local "treasure" for its pleasant, non-technical descent, a rarity in Marin County. This route also serves as a strategic connector, allowing access to other trails within the Marin County Open Space and Marinwood Open Space Districts, making it a cornerstone for advanced riders exploring the region.
5.0
(4)
33
riders
16.7km
01:34
380m
380m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
Details
Informations
Elevation 380 m
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