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Mount Diablo State Park
Park · Walnut Creek · Contra Costa County · California
Are dogs allowed at Mount Diablo State Park?
Yes, with restrictions. Dogs are NOT permitted on trails, fire roads or in park buildings. Dogs are allowed only in developed areas of the park. They must be kept on a leash during the day and in an enclosed vehicle or tent at night.
- Leash
- Required
- Maximum leash length
- 6 feet
- Official restrictions
- Dogs are NOT permitted on trails, fire roads or in park buildings. Dogs are allowed only…
Rules
| Rule | Value | Source | Verified |
|---|---|---|---|
| Dogs allowed | Yes, with restrictions | [1] California Department of Parks and Recreation | October 26, 2026 |
| Official restrictions | Dogs are NOT permitted on trails, fire roads or in park buildings. Dogs are allowed only in developed areas of the park. They must be kept on a leash during the day and in an enclosed vehicle or tent at night. | [1] California Department of Parks and Recreation | October 26, 2026 |
| Leash | Requiredagency-wide rule | [2] California Department of Parks and Recreation | October 26, 2026 |
| Maximum leash length | 6 feetagency-wide rule | [2] California Department of Parks and Recreation | October 26, 2026 |
| Leaving your dog alone | Not allowedagency-wide rule | [2] California Department of Parks and Recreation | October 26, 2026 |
Rules in every California state park
- Dogs must be on a leash no longer than 6 feet and physically under your control at all times.
- Dogs may not be left unattended. Overnight campers must keep dogs in a tent or vehicle.
- Unless an area is specifically designated for dogs on leash, dogs are not allowed in buildings, undeveloped areas or on trails.
- Clean up after your dog.
- Proof of vaccinations and a valid dog license may be required.
Source: [2] California Department of Parks and Recreation, checked October 26, 2026
Location
1260 N Gate Rd, Walnut Creek, 94598 · Contra Costa County · California · Map (OpenStreetMap)
Managed by California State Parks. Official page
Sources
- Visiting State Parks With Your Dog (parks.ca.gov), California Department of Parks and Recreation. Government agency, checked October 26, 2026.
Mount Diablo State Park | Dogs Allowed? Yes | Dogs are NOT permitted on trails, fire roads or in park buildings. Dogs are allowed only in developed areas of the park. They must be kept on a leash during the day and in an enclosed vehicle or tent at night.
- Visiting State Parks With Your Dog: statewide rules (parks.ca.gov), California Department of Parks and Recreation. Government agency, checked October 26, 2026.
Dogs must be on a maximum 6-foot leash at ALL times and physically under your control.
See something out of date? Rules change. If what you saw on site differs from this page, suggest a correction for Mount Diablo State Park or email corrections@dogpolicies.com. We re-verify against the official source, usually within a week, and log the result on the accuracy page.
Cite this record
Mount Diablo State Park (Walnut Creek, CA): Yes, with restrictions. Dogs are NOT permitted on trails, fire roads or in park buildings. Dogs are allowed only in developed areas of the park. They must be kept on a leash during the day and in an enclosed vehicle or tent at night. Source: California Department of Parks and Recreation, checked 2026-10-26. DogPolicies record: https://dogpolicies.com/places/mount-diablo-state-park/ (CC BY 4.0; cite with link).
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