Skyline Boulevard – Grizzly Peak Boulevard loop from Fruitvale

If you're seeking a truly rewarding gravel biking challenge with unparalleled vistas, the Skyline Boulevard – Grizzly Peak Boulevard loop from Fruitvale is an East Bay classic that delivers. This difficult 45.3-mile (72.9 km) route packs in a substantial 5169 feet (1575 metres) of climbing, typically taking around 5 hours and 22 minutes to complete. It's a demanding ride best suited for experienced cyclists ready to earn their panoramic views of the Bay Area.

What to expect on Skyline Boulevard – Grizzly Peak Boulevard loop from Fruitvale

Expect a diverse and dynamic ride, transitioning between paved roads and unpaved, packed-dirt fire roads and singletrack sections. As you gain elevation on Grizzly Peak Boulevard, the spectacular and continuous panoramic views of the San Francisco Bay, including the Golden Gate Bridge and Bay Bridge, unfold before you. Don't miss the sections around Redwood Road, which wind through narrow canyons densely surrounded by majestic redwood trees, offering a lush, 'fairy-tale forest' experience. This route demands good to very good fitness, with sustained and often steep ascents, making it ideal for riders who thrive on a physical challenge.

Planning your visit

Connecting from Fruitvale, you'll access a prominent ridge route that is very popular with cyclists, particularly around Tunnel Road and Skyline Boulevard. The loop traverses or offers access to several protected areas, including Reinhardt-Redwood Regional Park and Sibley Volcanic Regional Preserve, so be mindful of local regulations. Given the significant elevation gain and duration, ensure you carry ample water and nutrition. The best times to ride are typically on clear days when the fog breaks, allowing for the best views, though Skyline Boulevard can be wooded and sometimes foggy.

Trail details

• Distance: 45.3 miles (72.9 km)
• Elevation gain: 5169 feet (1575 metres)
• Difficulty: difficult
• Estimated time: 5 hours and 22 minutes