Routes

Planner

Features

Updates

App

Get the App

Mammoth Rock – Curry Point loop from Alamo

Mammoth Rock – Curry Point loop from Alamo

Hard

2.6

(2)

riders

Mammoth Rock – Curry Point loop from Alamo

03:53

54.6km

1,120m

Gravel riding

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: August 18, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Mount Diablo State Park

Waypoints

Start point

Parking

Get Directions

3.33 km

Diablo Foothills Regional Park

Nature Reserve

5.42 km

Mammoth Rock

Highlight • Natural Monument

Pine Valley opens up for great views of the tall carst rock outcrops.

Tip by

5.51 km

Sandstone caves in Castle Rock formations

Highlight • Cave

Water, wind, and calcite erosion in per-volcanic sandstone formation.
Slightly acidic rainwater seeps into the sandstone during winter rains and dissolves some of the calcite. Warm and dry days cause the moisture to pull the dissolved calcium back out of the rock, causing holes and caves to form.
Watch for peregrine falcons and other birds of prey nesting high up in the Castle Rock caves.
The upper trails are closed Feb-July to avoid disturbing the nesting birds.

Tip by

7.21 km

Pine Pond

Lake

8.68 km

Wall Pt. Road

Highlight (Segment) • Trail

Wall Point Rd is one of the best fire roads for riding in the area. It has excellent views of Mt Diablo, Las Trampas, San Francisco, Mount Tamalpais, and the Sacramento River delta in the distance. While quite climbable, it is much more fun to descend. There are some blind corners, steep rocky sections, and off-camber sharp turns with short climbs interspersed to slow you down. This route is popular for hikers, so try to keep your speed under control during this fun ride. The trail is entirely exposed to the afternoon sun, so getting an early start is recommended.

Tip by

17.5 km

Black Hills Reservoir

Highlight • Lake

Ascending through a challenging uphill climb, this trail takes you through a lush scenic open space, passing by the Black Hills Reservoir. It serves as a great stopping point for enjoying the scenic water views along your ride.

Tip by

24.1 km

Curry Point

Highlight • Viewpoint

This point is about halfway up to Mount Diablo. The view from here is stunning, offering vistas of rolling hills and lush green surroundings. If timed right, springtime wildflowers add an extra bonus to the experience.

Tip by

27.2 km

Livermore Valley Overlook

Highlight • Viewpoint

Pause a moment to enjoy the magnificent views over the Livermore Valley. There are picnic benches down the stairs should you want to rest up for a little longer on your way to the summit.

Tip by