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Half the adventure--and half the day--is getting there.

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2,085' 635 m


1,367' 417 m


1,222' 373 m


1,222' 372 m



Avg Grade (3°)


Max Grade (17°)

Dogs Off-leash

E-Bikes Unknown


Tour of the regional preserve north of Morgan Territory Road. The area's isolation in the "far east" of Contra Costa County, on the sunrise side of Mt. Diablo, means it gets light use and riders will feel they have the whole 5,000 acres to themselves--and a few cows. The "trails" are mostly smooth ranch roads, like most of the East Bay Regional Parks, with the occasional steep ascents and sketchy descents. Nice views over the Central Valley all the way to the Sierras when it's clear.

Need to Know

Summers can be hot and shade is sparse. Best time is spring during wildflower season but avoid rainy weather when trails turn to mud.


The Volvon Trail forms the backbone of this ride with the Blue Oak Trail and Valley View Trail forming the loop on the eastern side with the Eagle Trail, Highland Ridge and Stone Corral Trail forming the western loop.

From the trailhead, the Volvon Trail passes through a gate then merges with the road coming from the end of the large parking area. Over the hill it merges with a gravel road and at the next trail junction, keep left to stay on Volvon then a quick right to start the Blue Oak Trail.

Blue Oak Trail is an easy roll running parallel to Volvon and can be used as a shorter beginner loop returning on the Volvon Trail.

Turn right on the Volvon Trail for this ride then a quick right near the outhouse to start the Valley View Trail which quickly descends to the junction with the Manzanita Trail. Keep left where the trail descends steeply into a gully. First-timers may want to walk this section since it's somewhat blind and tree branches and other debris often litter the trail. Climbing back up the ridge you get the views to the east that this trail promises. One last steep pitch (push) reconnects with the Volvon Loop which circles the northern extent of Bob Walker Ridge then connects to the Eagle Trail near a fenced-in spring.

Eagle is a short climb to the junction with Highland Ridge Tr which offers a smooth, swooping, steep descent to the junction with Stone Corral Trail. The lower section of Stone Corral follow a creek and one of the few areas that is shaded. It doesn't last as Stone Corral heads back up the ridge, steeply in spots, to make up elevation lost coming down Highland Ridge.

At the top is the Volvon Loop Trail which merges with Volvon Trail for the backtrack ride to the trailhead.


Shared By:

Bob Gardner with improvements by Jim Scharff

Trail Ratings

  3.1 from 10 votes


  3.1 from 10 votes
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in California


16 Views Last Month
2,396 Since Jul 17, 2016
Intermediate Intermediate



A view down Stone Coral Trail
Jan 27, 2019 near Blackhawk, CA
View from Valley View Trail.
Jul 20, 2016 near Blackhawk, CA
Volvon Loop return leg climb
Apr 26, 2021 near Blackhawk, CA
Volvon Loop return leg looking over Mt. Diablo
Apr 26, 2021 near Blackhawk, CA
Volvon Loop looking back over the Los Vaqueros Reservoir
Apr 26, 2021 near Blackhawk, CA
Morgan Territory Regional Preserve, near the start of the Volvon Loop Trail.
Jul 19, 2016 near Blackhawk, CA



Current Trail Conditions

Add Your Check-In


Apr 26, 2021
Oliver Barnes
8.8mi — 1h 12m
Jun 22, 2020
Sarah H
Oct 7, 2019
Ryan Bicker
Cut off the last loop. 6.9mi
Jun 1, 2019
Roy Munson
Did Raven Trail first, then Volvon loop 12.1mi — 2h 01m
May 27, 2019
Roy Munson
Volvon loop starting from Morgan Territory Road and Highland Ridge Trail. Also did small loop off HRT. 10.5mi — 131h 21m
Jan 27, 2019
Ahsan A.
Great day, gorgeous views! 9.3mi
Oct 21, 2018
Alfonso Pena
Mar 12, 2017
Reto Trappitsch
Very muddy, missing the single tracks. But pretty and a good and not too hard workout

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