California State Parks · California
Mount Diablo State Park
California State Parks · California, United States
- Group sites
- Yes
- Drinking water
- Yes
- Restrooms
- Yes
- Showers
- Yes
- Dump station
- No
- Pets
- Yes
- Elevation
- 2,943 ft
- Dark sky
- Bortle class 4
- Cell coverage
- T-Mobile weak · AT&T weak · Verizon good (carriers' 4G LTE filings to the FCC, 2025-12; not measured here)
- Nearest town
- Walnut Creek
- Address
- 1260 N Gate Rd
- Phone
- (925) 837-6129
About
Mount Diablo State Park is a California State Park campground offering tent camping, group campsites, hike/bike campsites, RV camping in Contra Costa County.
Fees
California State Parks (ReserveCalifornia.com) does not publish one statewide nightly rate schedule; its own Booking and Fees page states rates 'vary based on the accommodation type and the amenities available at that park' and are posted per-park at booking time. A non-refundable $8.25 reservation fee (also $8.25 to modify or cancel) applies per ReserveCalifornia transaction, on top of the site's nightly rate. Fees include entry for one vehicle and one legally towed vehicle/trailer; additional vehicles are charged per-night at the park. 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.
Weather, month by month
| Month | Typical high | Typical low | Coldest night | Hottest day | Years with a night below 32°F |
|---|---|---|---|---|---|
| January | 49° | 34° | 25° | 66° | 8 of 11 |
| February | 51° | 35° | 22° | 65° | 7 of 11 |
| March | 55° | 36° | 26° | 75° | 6 of 11 |
| April | 57° | 39° | 30° | 71° | 2 of 11 |
| May | 66° | 44° | 36° | 81° | 0 of 11 |
| June | 72° | 48° | 41° | 94° | 0 of 11 |
| July | 77° | 50° | 45° | 90° | 0 of 11 |
| August | 77° | 51° | 48° | 92° | 0 of 11 |
| September | 72° | 49° | 44° | 86° | 0 of 11 |
| October | 67° | 46° | 38° | 84° | 0 of 10 |
| November | 56° | 40° | 30° | 66° | 3 of 10 |
| December | 48° | 35° | 27° | 57° | 7 of 10 |
Mid-month figures from 2016–2026 of daily weather at this spot (ERA5 reanalysis via Open-Meteo, CC BY 4.0), in °F. Typical is the median; coldest and hottest are the extremes seen.
Nearby campgrounds
- Black Diamond Mines Regional Preserve Group Camp · City, County & Regional Parks · 7 mi
- Las Trampas Wilderness Regional Preserve Group Camp · City, County & Regional Parks · 7 mi
- Briones Regional Park Group Camp · City, County & Regional Parks · 12 mi
- Anthony Chabot Regional Park Family Campground · City, County & Regional Parks · 13 mi
- Reinhardt Redwood Regional Park Group Camp · City, County & Regional Parks · 13 mi
All public campgrounds in California · Every state and province · Facts read from the operator 2026-08-25. Confirm fees, rules and current status with the operator before you go.