home › San Francisco Bay Area › East Bay › Park
Black Diamond Mines Regional Preserve
Park · Antioch · Contra Costa County · California
Are dogs allowed at Black Diamond Mines Regional Preserve?
Yes.
- Leash
- Varies by area
- Maximum leash length
- 6 feet
- Official restrictions
- Leashed dogs may enter the Greathouse Visitor Center; dogs are not allowed on mine tours.
Rules
| Rule | Value | Source | Verified |
|---|---|---|---|
| Dogs allowed | Yes | [1] East Bay Regional Park District | October 28, 2026 |
| Official restrictions | Leashed dogs may enter the Greathouse Visitor Center; dogs are not allowed on mine tours. | [1] East Bay Regional Park District | October 28, 2026 |
| Leash | Varies by areaagency-wide rule | [3] East Bay Regional Park District | October 28, 2026 |
| Maximum leash length | 6 feetagency-wide rule | [3] East Bay Regional Park District | October 28, 2026 |
Rules in every East Bay regional park
- Dogs must be on a leash (6 feet maximum) in parking lots, picnic sites, lawns and other developed areas, within 200 feet of a trailhead or staging area, at posted areas, and wherever grazing animals are present.
- Dogs may be off leash in open space and undeveloped areas, if they stay in view, under voice control and return to the leash when called. Carry a 6-foot leash for each dog.
- No dogs at swimming pools, beaches, wetlands, marshes or designated nature study areas.
- Walking more than three of your own dogs, or walking dogs for a fee, needs a revocable annual district permit.
- Pick up your dog's waste and put it in a trash can or carry it out; never leave bags along a trail.
- Do not leave a dog unattended anywhere in the parks. Dangerous dogs are not allowed.
Source: [3] East Bay Regional Park District, checked October 28, 2026
Location
5175 Somersville Road, Antioch, 94509 · Contra Costa County · California · Map (OpenStreetMap)
Managed by East Bay Regional Park District. Official page
Sources
- Black Diamond Mines Regional Preserve (ebparks.org), East Bay Regional Park District. Government agency, checked October 28, 2026.
Please note that while dogs on leash are allowed in the Greathouse Visitor Center, they are not permitted on Mine Tours.
- Location: park entrance map link on Black Diamond Mines Regional Preserve page (ebparks.org), East Bay Regional Park District. Government agency, checked October 28, 2026.
- Dogs (ebparks.org), East Bay Regional Park District. Government agency, checked October 28, 2026.
Dogs may be off-leash in open space and undeveloped areas of parklands, provided they are under control at all times.
See something out of date? Rules change. If what you saw on site differs from this page, suggest a correction for Black Diamond Mines Regional Preserve 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
Black Diamond Mines Regional Preserve (Antioch, CA): Yes. Source: East Bay Regional Park District, checked 2026-10-28. DogPolicies record: https://dogpolicies.com/places/black-diamond-mines-regional-preserve/ (CC BY 4.0; cite with link).
This record as JSON (CC BY 4.0) · as Markdown · embed panel
More in Contra Costa County
- Acalanes Ridge Open Space Yes · Yes. Dogs may be off leash under voice control. Park · Walnut Creek · Contra Costa County · verified 2026-10-31
- Baldwin Dog Park Yes · Yes. This is a dog park. Park · Concord · Contra Costa County · verified 2026-10-30
- Best Western Brentwood Inn Varies by location · Depends on the hotel: Best Western lets each hotel decide. Where pets are accepted: up to 2 pets per room; up to 80 lb each; up to $40 per room per night. Lodging · Brentwood · Contra Costa County · verified 2026-10-26
- Best Western Heritage Inn Varies by location · Depends on the hotel: Best Western lets each hotel decide. Where pets are accepted: up to 2 pets per room; up to 80 lb each; up to $40 per room per night. Lodging · Concord · Contra Costa County · verified 2026-10-26
- Best Western John Muir Inn Varies by location · Depends on the hotel: Best Western lets each hotel decide. Where pets are accepted: up to 2 pets per room; up to 80 lb each; up to $40 per room per night. Lodging · Martinez · Contra Costa County · verified 2026-10-26
- Best Western Plus, Oakley Varies by location · Depends on the hotel: Best Western lets each hotel decide. Where pets are accepted: up to 2 pets per room; up to 80 lb each; up to $40 per room per night. Lodging · Oakley · Contra Costa County · verified 2026-10-26
- Best Western, Danville Varies by location · Depends on the hotel: Best Western lets each hotel decide. Where pets are accepted: up to 2 pets per room; up to 80 lb each; up to $40 per room per night. Lodging · Danville · Contra Costa County · verified 2026-10-26
- Big Break Regional Shoreline Yes · Yes. Park · Oakley · Contra Costa County · verified 2026-10-28