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Phone Numbers
Contra Costa Trails Office Toll Free: 888-EBPARKS (888-327-2757), option 3, extension 4509

View Trail Map

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5:00am to 10:00pm unless otherwise posted

Park Events
Click HERE for upcoming events

Parking Fee

Emergency Number

EBRPD Headquarters
1-888-EBPARKS or

Briones to Mt. Diablo Regional Trail

About The Trail

Spanning the distance between Briones Regional park and Mt. Diablo State Park, this trail serves the communities of Lafayette and Walnut Creek and makes important connections to major regional trails, including the Contra Costa Canal Trail, California State Riding and Hiking Trail, and the Iron Horse Regional Trail. The Briones-to-Mt. Diablo Trail also connects schools, community facilities, and city parks and open space areas, including Briones Regional Park, Larkey Park, Heather Farm Park, Shell Ridge Open Space, Diablo Foothills Regional Park, and Mt. Diablo State Park. This trail is multi-use with paved and unpaved portions, and offers opportunities for trail users of all abilities. The paved portions (including the segment shared with the Contra Costa Canal Trail) are accessible to trail users in wheelchairs. Sweeping views of Pleasant Hill and Walnut Creek may be seen from portions of the trail.

Leaving Briones, the trail passes over Acalanes Ridge (Walnut Creek Open Space) into Larkey Park and past the Alexander Lindsey Museum. It shares a right-of-way with the Contra Costa Canal Trail for a short distance, passes by Heather Farm Park, goes into Shell Ridge Open Space, enters the Park District's Diablo Foothills Regional Park, and finally enters Mt. Diablo State Park. The trail provides access to community facilities and natural areas. Scenic vistas, wildlife viewing, and beautiful natural settings reward users of this regional trail corridor.


Trail Mileage Guide

ADA accessibility iconTrail Accessibility

Certain sections of the trail are wheelchair accessible.

Responsible Trail-Use Rules

Multi-Use Trail

Safe multiple use of this and other multiple use trails requires everyone's cooperation. Each trail user is asked to exercise common courtesy. BICYCLES YIELD to horses and hikers. HIKERS YIELD to horses. Stay to the right of the trail except when passing. NO MOTORIZED VEHICLES are permitted on the trail, wheelchairs excepted.

Violations of any of the following may result in citation.

All Trail Users:

  • Be safe, considerate and aware of your impact on the trail and other trail users.
  • For everyone's safety, keep to the right. Proceed single file around blind curves.
  • For your safety, headphones are not advised.
  • Safety helmets are required by law for bicyclists under age 18, and are strongly recommended for all bicyclists and equestrians.
  • Dogs must be on leash where posted, and under full verbal control elsewhere. Please clean up after your dog.


  • Bicycles are not permitted, either walked, ridden or carried, on trails marked "No Bicycles."
  • Bicycles shall not be ridden at an unsafe speed, or greater than the posted speed limit. Be aware of how you are perceived by other trail users.
  • Bells are required on bicycles on Park District trails.
  • Bicycles always yield to pedestrians. Before passing, SLOW DOWN, ring bell and establish verbal contact.
  • When approaching equestrians, call out, ring bell and STOP, whether you are seen or not. Ask for instructions on how to pass safely.
  • On blind turns, SLOW DOWN, call out, ring bell and ride single file.


  • Keep to the right when approached by others.
  • Always yield to equestrians.
  • Look behind and to both sides before changing course.


  • Keep your horse to the right or where safe when encountering other trail users.
  • Communicate. Let other trail users know how to pass your horse safely.
  • Please clean up after your horse on paved trails.

Trail conflicts or violations should be reported to the Trail Hotline at (510) 733-6991. For an immediate response, call (510) 881-1833. In case of emergency dial 9-1-1.

Trail Map

Click the map image below to see an enlarged version.

Trail Map

Directions for navigating the enlarged map:
When the enlarged version of the map opens click on the 'Full Expand' icon in the lower right hand corner of the map to see the 'Actual Size' map.
'Full Expand' icon > Full Expand

When the 'Actual Size' map is viewable, you can 'Click-Hold and Drag' the mouse button (left on a PC) to reposition the map, as desired.

'Single-Click' on the 'Enlarged' or 'Actual Size' map to return to the park page.