Fairfax – Alpine Lake - Bon Tempe Dam loop from Larkspur

If you're looking for a serious mountain biking challenge with big rewards, the Fairfax – Alpine Lake - Bon Tempe Dam loop from Larkspur is definitely worth your time. This difficult 36.0-mile (58.0 km) route packs in 3289 feet (1002 metres) of climbing over roughly 4 hours and 53 minutes, making it a fantastic option for experienced riders seeking a long, diverse day in the saddle.

What to expect on Fairfax – Alpine Lake - Bon Tempe Dam loop from Larkspur

This loop takes you on a journey through the varied landscapes of the Mount Tamalpais Watershed, offering a dynamic ride that keeps things interesting. You'll navigate a mix of wide gravel trails, dirt roads, and fire roads, with some short, steep sections to test your legs, especially in wooded areas. The scenery is a constant highlight, with impressive panoramic views of both Bon Tempe Lake and Alpine Lake, often framed by the majestic Mount Tamalpais. Expect to pedal through tranquil redwood forests and past shimmering lakes, especially if you ride counter-clockwise, and keep an eye out for diverse birdlife and spring wildflowers like California poppies.

Planning your visit

Before you head out, be aware that a day-use fee is typically required for parking in the area, so plan accordingly. While many fire roads and gravel paths are open to mountain bikes, remember that bikes are not permitted on all hiking trails, particularly singletrack, so always adhere to local regulations. The spring months are particularly beautiful for this ride, with wildflowers in bloom, but the views are rewarding year-round.

Trail details

• Distance: 36.0 miles (58.0 km)
• Elevation gain: 3289 feet (1002 metres)
• Difficulty: difficult
• Estimated time: 4 hours and 53 minutes