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Twin Ponds – Museum of the San Ramon Valley loop from Alamo

Twin Ponds – Museum of the San Ramon Valley loop from Alamo

Hard

3.3

(19)

riders

Twin Ponds – Museum of the San Ramon Valley loop from Alamo

02:50

37.5km

670m

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 a protected area

Please check local regulations for:

Mount Diablo State Park

Waypoints

Start point

Parking

Get Directions

2.62 km

Twin Ponds

Highlight • Lake

Two small ponds, mostly dry by summer, at the junction with Borges Ranch Trail. They fill again with the winter rains and last through spring and early summer. They are dry in late summer and fall.

Tip by

3.02 km

Foothills Trail and Borges Ranch Trail junction

Highlight • Trail

At this intersection you either decide to continue on Borges Ranch Trail or on Foothills Trail – both are great gravel roads.

Tip by

3.89 km

Briones to Mount Diablo Regional Trail

Highlight (Segment) • Trail

Gravel at its best. This road is a paradise for gravel bikers and novices on a mountain bike.

Tip by

6.17 km

Mammoth Rock

Highlight • Natural Monument

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

Tip by

6.26 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

7.96 km

Pine Pond

Lake

20.1 km

Mount Diablo Scenic Boulevard

Highlight (Segment) • Trail

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

28.4 km

Museum of the San Ramon Valley

Highlight • Historical Site

The Museum of the San Ramon Valley was established in 1985 and sits in a restored 1891 Southern Pacific Railroad Depot with the Victorian-era “Combination Station No. 22” listed on …

Tip by

32.8 km

Alamo Trailhead - San Ramon Valley Iron Horse Trail

Highlight • Trail

Best Trans-Contra Costa car-free bike route to access the park trails

Tip by

37.5 km

End point

Parking

Way Types & Surfaces

Way Types

14.7 km

13.9 km

8.21 km

511 m

209 m

Surfaces

17.6 km

14.1 km

5.80 km

Elevation

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

Highest point (520 m)

Lowest point (70 m)

Weather

Today

Friday 4 September

24°C

12°C

0 %

Additional weather tips

Max wind speed: 20.0 km/h

to get more detailed weather forecasts along your route

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Twin Ponds – Museum of the San Ramon Valley loop from Alamo

Twin Ponds

Foothills Trail and Borges Ranch Trail junction

Briones to Mount Diablo Regional Trail

Mammoth Rock

Sandstone caves in Castle Rock formations

Mount Diablo Scenic Boulevard

Museum of the San Ramon Valley

Alamo Trailhead - San Ramon Valley Iron Horse Trail

Nearby routes

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