MTB Project Logo
Climb
MTB
Hike
Trailrun
Ski

Summit Trail - Rock City Segment

Very Difficult Very Difficult
 4.0 (1)
  1. Areas
  2. CA
  3. …Tri-Valley
  4. Mount Diablo State Park
Explore MTB in 3D
Use onX Backcountry to explore the terrain in 3D, view recent satellite imagery, and more. Now available in onX Backcountry Mobile apps! For more information see this post.
Previous Next

“Tight switchback into a rock stair drop followed by rock garden gulch with a mellow contour out at the end. ”

Preston Jordan
Your Rating: Rating Rating Rating Rating Rating      Clear Rating
Your Difficulty:
Your Favorites: Add To-Do · Your List

0.5

Miles

0.7

KM
Singletrack

1,719' 524 m

High

1,485' 453 m

Low

29' 9 m

Up

245' 75 m

Down

11%

Avg Grade (7°)

24%

Max Grade (14°)

Dogs Unknown

E-Bikes Unknown

Description

After the tight switchback entry, it is rockstacles on steep down into and along a gulch. Contours out the end. Described downhill perhaps needless to write. If you can clean this, my helmet's off (although not during this trail). This author has not come close.

Contacts

Local Club: Bicycle Trails Council of the East Bay

Oct 6, 2026: BTCEB Buzz October 2026

Oct 5, 2026: BTCEB celebrates community, culture and cinema

Oct 4, 2026: Winners Announced in 2026 CAMTB Dreambike Giveaway!

Land Manager: California State Parks - Mount Diablo State Park

Shared By:

Preston Jordan
Full Details

Trail Ratings

  4.0 from 1 vote

#11

in Mount Diablo State Park

#16572

Overall
  4.0 from 1 vote
5 Star
0%
4 Star
100%
3 Star
0%
2 Star
0%
1 Star
0%
Trail Rankings

#11

in Mount Diablo State Park

#1,282

in California

#16,572

Overall
3 Views Last Month
140 Since Jul 11, 2020
Very Difficult Very Difficult
0%
0%
0%
0%
0%
100%
Add a Photo

Photos

View of Sentinal Rock looking west towards Las Trampas
Oct 9, 2014 near Diablo, CA
Sign post at the top of the Rock City segment of the Summit Trail (no no bikes symbol)
Jul 11, 2020 near Diablo, CA

0 Comments

Weather

Current Trail Conditions

Unknown
Add Your Check-In

Check-Ins

none

Nearby Recommended Routes

Welcome

Join the Community! It's FREE

Already have an account? Login to close this notice.

Get Started