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Park Info

Address - Main Entrance
1200 Frederickson Lane
Antioch, CA 94509

Park Entrances
Main Entrance  

Swim Lagoon 
> Boat Launch 
> ADA Fishing Dock

Phone Number
Toll Free: 888-EBPARKS (888-327-2757), option 3, extension 4518

Local Weather

View Trail Map
Download PDF Map
Yahoo Map
Transit & Trails
Wayside Panels - Anza

Panorama Panorama

Park Hours
See details

Park Events
Click HERE for upcoming events

Parking Fee
$5 per vehicle; $4 per trailered vehicle. Buses: $25/per bus.

Dog Fee
$2 per dog. Guide/service dogs free

Grazing Information
Grazing in the Parks

Beach Access Fee
See the Swim Facilities page

Boat Launch Fee
See the Boating/Sailing page

Camping Reservations
No reservable campgrounds

Picnic Reservations
1-888-EBPARKS or 1-888-327-2757, press option 2, then 1

Emergency Number

EBRPD Headquarters
1-888-EBPARKS or 1-888-327-2757

Park Update

Grazing Update
There are cattle grazing at the East Side of the park.

Contra Loma Regional Park

Watercraft Owners - Please Help Keep Invasive Mussels Out of Our Water.
> Read more about mandatory watercraft inspections and the Invasive Mussel...
Contra Loma Regional Park


The boat launch facility will be closed for rehabilitation beginning September 25, 2017, and shall reopen in spring 2018. Improvements will include improvements to the boat launch, paving and striping of the parking area, new vaults toilets, new and relocated fish cleaning station, and new drinking fountains. All other areas of Contra Loma Regional Park shall not be impacted by this construction. This project is made possible through generous grants from the Bureau of Reclamation and the California Department of Boating and Waterways.

Trailered boats will not be able to launch during the rehabilitation project.  Kayaks and inflatables can be launched from the shore line at Channel Point after passing Quagga inspection.

Notice to Boat Owners

Please help keep Invasive Mussels out of our waters. Read more about the Boat Inspections and the Invasive Mussel.

About The Park

Contra Loma's 780 acres include an 80-acre reservoir for year-round fishing and a lifeguarded swim lagoon for summertime swimming. Enjoy these attractions along with year-round hiking, biking, and nature study at this Contra Costa County oasis. Alcohol is not permitted.

Wildflower Photo Guide

> Contra Loma (1.6 Mb, 11 x 8.5, 14 pages Acrobat PDF)

Submit Your Photos to the EBRPD Photo Pool

Park Hours

Area Dates Open Hours
Park Gates January 7:00am - 5:30pm
February 7:00am - 6:00pm
March 7:00am - 7:00pm
April 6:00am - 8:00pm
May to August 6:00am - 8:30pm
September 6:00am - 8:00pm
Oct 1 - Nov 4 7:00am - 7:00pm
Nov 5 - Dec 31
7:00am - 5:30pm
Swim Lagoon Public Swim Hours:
May vary due to weather, water quality, staffing availability and visitation.

Food concession hours are same as swim hours.
Open Weekends
& Holidays from 
April 29 - May 29
11:00am - 6:00pm
Open Daily from 
May 30 - Aug 18

11:00am - 6:00pm

Open Weekends
& Holidays from
Aug 19 - Sept 17

11:00am - 6:00pm

. .

Park Activities

Contra Loma

The lake's swim lagoon has a sandy beach with restrooms and a concession stand. Shady picnic areas on a green lawn are accessible to the disabled. Alcohol is not permitted anywhere in the park. Swimming is permitted in the lagoon only, in the summer when lifeguards are on duty. There is a beach access fee. For fee information and lifeguard schedule, visit the Swim Facilities page. Swim lessons and the Jr. Guard program are held at the lagoon in the summertime. For information, see Aquatic Programs at the Park District's program registration page. Visitors to Contra Loma may launch their own boats. For boat launch information, see our Boating and Sailing page. Persons using float tubes must have with them life jackets.

The reservoir contains catfish, black and striped bass, bluegill, trout, and red-eared sunfish for fishing. A Daily Fishing Access Permit is required and can be purchased at the park entry kiosk. Other information on fishing can be found in the Fishing section of this site.

From Contra Loma there are trail connections to Black Diamond Mines Regional Preserve.

Note: The Contra Costa Water District, which owns the reservoir, requires that all windsurfers shower a minimum of 2 minutes prior to entering the reservoir and wear at least a short wetsuit. Showers are located outside the restrooms and next to the beach used by windsurfers. Persons using float tubes must wear waders or other wetsuit material to eliminate body contact with the water in the reservoir. People using sea kayaks that self bail must shower prior to entering the reservoir and wear at least a short wet suit. Other dry-type kayaks are permissible with the only restriction being no rollovers or other activities that cause body contact with the water.

ADA accessibility iconPark Accessibility

Contra Loma has wheelchair accessible restrooms, drinking fountains, and parking. The south fishing dock is wheelchair accessible and may be reached by paved trail. The shady picnic areas near the lake's swim lagoon are wheelchair accessible. The swim lagoon has an accessible pool lift.

A beach wheelchair, intended to provide a means for wheelchair users to travel around the swimming lagoon, is available for free on a first-come, first-served basis.  It requires an assistant to push and may enter the water. For information about use of the beach wheelchair or pool lift, please contact the park office at 888-327-2757, option 3, ext. 4518.

Trail Accessibility Report

West Shore Trail: Download PDF format | Download Word format

To Reach The Park

To reach Contra Loma from Highway 4 in Antioch, exit on Lone Tree Way, go right on Golf Course Road and right on Frederickson Lane to the park.

Click here for public transit information.

Transit & Trails: Contra Loma Regional Park (transit, biking, and walking directions) 

Trail Map

Click the map image below to see an enlarged version.

Contra Loma 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.

Interpretive Panels 

CL Butterflies in the Garden
Butterflies in the Garden (1.5 MB, PDF)

CL Enhancing Butterfly Habitat
Enhancing Butterfly Habitat
(1.6 MB, PDF)