> Canonical: https://caparks.org/parks/mount-diablo-state-park > Content revision: 2026-10-20T20:49:55.378Z [State parks](https://caparks.org/types/state-park)[Contra Costa](https://caparks.org/counties/contra-costa) # Mount Diablo State Park Contra Costa · California Department of Parks and Recreation BEFORE YOUR VISIT Closure noticeFacilities ### Mount Diablo State Park: Summit Visitor Center elevator Park-specific information - [Summit Visitor Center elevator](https://caparks.org/parks/mount-diablo-state-park) The elevator is out of service until further notice. The source distinguishes this from ground-level access; confirm facility-specific access with the park before visiting. [Read the official notice: California State Parks visitor directory ↗](https://www.parks.ca.gov/?page_id=517)Source checked Oct 20, 2026 PLAN YOUR VISIT ## The practical details. **Managing agency**: California Department of Parks and Recreation **Telephone**: [(925) 837-6129](tel:9258376129) **Hours**: Gates open 8:00am and close at sunset. Visitors should plan to be in their vehicles by sunset and headed out to avoid being locked in. ________________________________ Buses: Pilot car recommended [Official park information](https://www.parks.ca.gov/?page_id=517) We have not yet verified entry fees, accessibility details. Confirm these with the managing agency before traveling. Check notice timestamps and official updates. Conditions can change between source checks. ## Weather & forecast National Weather Service · [Official forecast ↗](https://forecast.weather.gov/MapClick.php?lat=37.852026&lon=-121.925476) ## About Mount Diablo State Park Mount Diablo State Park is listed in official public-land records for Contra Costa, California and is managed by California Department of Parks and Recreation. Our research into visitor facilities is ongoing. Check the managing agency’s information for public entrances, permitted activities, and current access. ## Activities & facilities [Camping ↗](https://caparks.org/activities/camping)[Picnicking ↗](https://caparks.org/activities/picnicking)[Interpretive programs ↗](https://caparks.org/activities/interpretive-programs)[Museums ↗](https://caparks.org/activities/museums)[Geocaching ↗](https://caparks.org/activities/geocaching)[Biking ↗](https://caparks.org/activities/biking)[Hiking ↗](https://caparks.org/activities/hiking)[Horseback riding ↗](https://caparks.org/activities/horseback-riding)Tent CampingGroup CampsitesHike-and-Bike CampsitesRV AccessParkingRestrooms / ShowersRestroomsDrinking Water AvailableHistorical/Cultural SitePicnic AreasEnv. Learning/Visitor CenterExhibits and ProgramsGuided ToursInterpretive ExhibitsVista PointNature & Wildlife ViewingFamily ProgramsBike TrailsHiking TrailsHorseback Riding Recorded from park sources. Availability and restrictions may vary by season or visitor area. ## Mapped hiking trails. OpenStreetMap routes that intersect recorded park boundaries. Distances cover each route’s mapped California portion, which may extend beyond this park. Check official maps and current access rules. - [ADT - California - T - Seg 7 ↗](https://caparks.org/trails/adt-california-t-seg-7-osm-9161548)34.7 mapped mi - [Briones to Mt. Diablo Regional Trail ↗](https://caparks.org/trails/briones-to-mt-diablo-regional-trail-osm-1354568)11.9 mapped mi - [Diablo Regional Trail ↗](https://caparks.org/trails/diablo-regional-trail-osm-11223063)30.0 mapped mi - [Falls Trail Loop ↗](https://caparks.org/trails/falls-trail-loop-osm-15652685)5.9 mapped mi - [Las Trampas to Mt. Diablo Regional Trail ↗](https://caparks.org/trails/las-trampas-to-mt-diablo-regional-trail-osm-11223183)5.4 mapped mi - [Mokelumne Coast to Crest Trail ↗](https://caparks.org/trails/mokelumne-coast-to-crest-trail-osm-4139386)99.3 mapped mi [All mapped hiking routes ↗](https://caparks.org/trails) Trail data © [OpenStreetMap contributors](https://www.openstreetmap.org/copyright) · [ODbL](https://opendatacommons.org/licenses/odbl/1-0/) ## Find your way. Map points represent park land, not verified visitor entrances. Follow the managing agency’s entrance directions. Tiles © OpenStreetMap contributors. This point represents park land, and may not be a public entrance. Follow official entrance directions. [Official visitor information & directions ↗](https://www.parks.ca.gov/?page_id=517) ## Read before you roam. [THE FIELD GUIDE ### Plan for campground and visitor-service changes Separate overnight access, sanitation, boat slips, and maintenance when checking a park’s visitor services. Read the guide](https://caparks.org/guides/campgrounds-and-visitor-services) ## Sources & verification Park facts and notices are checked separately. Missing facility information does not mean a facility is absent. Official visitor page checked Oct 20, 2026. - [California State Parks visitor directory](https://www.parks.ca.gov/?page_id=21805) · Oct 20, 2026 [Suggest a correction](https://caparks.org/about#corrections) · [Markdown version](https://caparks.org/parks/mount-diablo-state-park.md) ## Nearby parks. Within 35 miles in a straight line. Travel distances and entrances vary. [All parks](https://caparks.org/parks) [Alameda ### Bethany Reservoir State Recreation Area Boating · Picnicking](https://caparks.org/parks/bethany-reservoir-state-recreation-area) [Solano ### Benicia Capitol State Historic Park Interpretive programs · Museums](https://caparks.org/parks/benicia-capitol-state-historic-park) [Alameda ### Robert W. Crown Memorial State Beach Boating · Picnicking](https://caparks.org/parks/robert-w-crown-memorial-state-beach)