The public can visit East Bay Regional Park sites for free on the third Friday of each month, starting this Friday.
Fees for parking, swimming, fishing, and launching boats -- plus entry charges for dogs and horses -- will be waived one Friday per month at regional parks the rest of the year to celebrate the 80th anniversary of the park system.
The district has more than 65 regional parks in Contra Costa and Alameda counties.
Anglers still will need to have a state fishing license, and the district will continue to collect fees for camping and reserved group picnic sites.
The regional park system was founded in 1934 during the Great Depression when East Bay residents agreed to raise property taxes to buy and protect open space.