Bay Overlook – Round Top Loop Trail loop from Rockridge

Bay Overlook – Round Top Loop Trail loop from Rockridge

Hard

2.7

(22)

riders

Bay Overlook – Round Top Loop Trail loop from Rockridge

01:40

21.0km

540m

Gravel riding

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: September 10, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Sibley Volcanic Regional Preserve

Waypoints

Start point

Train Station

Get Directions

3.42 km

Tunnel Road & Skyline Blvd to Grizzly Peak Blvd

Highlight (Segment) • Climb

Tunnel Road and Skyline Boulevard to Grizzly Peak Boulevard are in an area that is popular with bikers. This hill has an average grade of 4.3%, a steady climb. Bikers enjoy windy roads and views of homes and Bay Area architecture.

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8.31 km

Bay Overlook

Highlight • Viewpoint

A nice reward after climbing up Tunnel Road and Skyline Boulevard!

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9.03 km

Round Top Loop Trail

Highlight (Segment) • Trail

This beautiful, wide forest trail skirts around the northwest flank of Round Top. While the entire loop around the mountain is open for hiking, this section is the only part allowed for cycling.

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9.97 km

Volcanic Trail

Highlight (Segment) • Trail

This trail leads up to 1,634-foot Volcanic Peak. You can also bike to the summit of nearby Round Top, but the access road there is paved, so it's not as suited to a mountain bike.

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10.8 km

Volcanic Trail outlook

Highlight • Viewpoint

Mount Diablo is framed by the canyon on either side of you as you reach the far east side of the overlook. Back at the junction, the wide crushed gravel path rewards you with a bench and view of the hills over Siesta Valley. The Sibley Labyrinth offers a variety of secluded trails that wind down the mountainside and take you through volcanic history.

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13.9 km

Sibley Staging Area

Highlight • Rest Area

The Sibling Staging Area at Sibley Volcanic Regional Preserve has 38 parking spots, public restrooms, a visitors center, educational signage, and a spot for filling water bottles.

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