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Mammoth Rock – Castle Rock Recreation Area loop from Diablo

Routes

Bike touring routes & trails

Mammoth Rock – Castle Rock Recreation Area loop from Diablo

Hard

2.5

(15)

riders

Mammoth Rock – Castle Rock Recreation Area loop from Diablo

02:20

24.1km

590m

Cycling

Hard bike 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: July 1, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Mount Diablo State Park

Waypoints

Start point

Parking

Get Directions

7.22 km

Pine Pond

Highlight • Lake

This little pond is really more like a bog, but it is a good marker along the trail, as you pass it right by the junction with Little Pine Creek/Burma Road and Stage Road.

Tip by

12.5 km

Located in Diablo Foothills Regional Park, the area is popular with rock climbers. ebparks.org/parks/diablo_foothills

Check out my Little Yosemite Trail tour for more pictures of the area.
komoot.de/tour/4100005

Tip by

12.8 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 …

Tip by

12.9 km

Mammoth Rock

Highlight • Natural Monument

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

Tip by

12.9 km

Castle Rock Recreation Area

Highlight • Climb

The Castle Rock formations are a popular destination for local rock climbers in this scenic canyon along Pine Creek, with Mammoth Rock the largest. The prominent sandstone amid the oak …

Tip by

13.6 km

Sandstone Formations With Holes, Diablo Foothills Regional Park

Highlight • Natural Monument

The rocks in that area are made of sandstone. During our winter rains, acidic rain water seeps into and sits in the rocks. The next summer, the dry heat pulls …

Tip by

15.0 km

Winding Path in Diablo Foothills Regional Park

Highlight • Trail

Diablo Foothills Regional Park is a 1,060 acres area in California. You can enjoy its panoramic views as you joyfully cycle through the multiple trails that allow access to the …

Tip by

24.1 km

End point

Parking

Way Types & Surfaces

Way Types

15.7 km

4.11 km

2.07 km

1.94 km

208 m

< 100 m

Surfaces

15.8 km

4.01 km

3.67 km

615 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (520 m)

Lowest point (130 m)

Weather

Tuesday 11 August

30°C

13°C

0 %

Additional weather tips

Max wind speed: 12.0 km/h

to get more detailed weather forecasts along your route

Comments

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Mammoth Rock – Castle Rock Recreation Area loop from Diablo

Wall Point

Pine Pond

Stage Road

Sandstone caves in Castle Rock formations

Mammoth Rock

Castle Rock Recreation Area

Sandstone Formations With Holes, Diablo Foothills Regional Park

Winding Path in Diablo Foothills Regional Park

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