Devil's Slide – Ace Trail loop from San Bruno

If you're after a mountain biking challenge that delivers big on coastal drama, the Devil's Slide – Ace Trail loop from San Bruno is definitely worth your time. This difficult 28.3-mile (45.5 km) route packs in a substantial 3661 feet (1116 metres) of climbing, taking roughly 3 hours and 55 minutes to complete. It's a fantastic option for experienced riders seeking a varied and demanding day out with stunning Pacific views.

What to expect on Devil's Slide – Ace Trail loop from San Bruno

The route begins with the iconic Devil's Slide Trail, a paved, multi-use path that was once a treacherous stretch of Highway 1. Here, you'll enjoy uninterrupted panoramic views of the Pacific Ocean and the rugged coastline, with interpretive signs detailing the area's unique geology and history. However, the inclusion of the Ace Trail quickly transforms the ride into a hard mountain bike experience. Expect a mix of demanding singletrack, rocky descents, and strenuous climbs up hills like Montara Mountain, requiring good fitness and advanced riding skills. The terrain is diverse, moving from smooth pavement to rugged cliffs and prominent bluffs, offering a truly varied journey.

Planning your visit

This loop is known for its spectacular coastal views and the unique history of the Devil's Slide section. Starting from San Bruno means you'll be integrating this core loop into a broader network of trails, offering even more diverse terrain and views of both the Pacific Ocean and the San Francisco Bay. Be prepared for technical challenges on the Ace Trail, as some hard routes in the Pacifica area may even require you to push your bike. Always check local conditions before heading out, especially regarding weather along the exposed coastline.

Trail details

• Distance: 28.3 miles (45.5 km)
• Elevation gain: 3661 feet (1116 metres)
• Difficulty: difficult
• Estimated time: 3 hours and 55 minutes