Many of the Bay Area’s COVID-19-weary residents will be eager to get outdoors this weekend and enjoy spring temperatures that are expected to reach the 80s or even 90s through Saturday.

The good news is that a number of county, state and national parks have remained open during the pandemic for walking, running, biking and other activities, so that people can stay healthy and reduce stress. San Mateo County officials also announced this week that they had reopened 13 of the county’s 23 parks, following state and county orders last week to ease shelter-in-place restrictions on outdoor activities.

But for all potential visitors to Bay Area parks this weekend, officials have a message: Think local and don’t leave your county.

Officials believe that a number of people have been traveling far from their homes over the past couple weekends to crowd into some of the Bay Area’s most popular parks. This has been especially true in coastal areas, prompting officials to close most beaches in Sonoma, Marin, San Francisco and San Mateo counties.

Of course, the more crowded a park gets, the harder it is for people to practice social distancing, officials say. That’s why officials are asking people to only visit parks that are a few miles from their homes or, in some cases, close enough to walk or bike to.

San Mateo County Parks Director Nicholas Calderon said the 13 parks that reopened in his county are in residential areas and should only be used by people who live close enough to walk in or “travel a short distance.”

Marin County’s April 29 order similarly said people should only use parks that are near their homes and that are “readily accessible by foot, bicycle or other non-motorized means.” Sonoma County issued a similar edict for its parks last week.

To discourage people from traveling too far to get to a park or open space, Calderon and other officials have closed roads, staging areas and parking lots, or they have banned roadside parking. They only allow vehicles that are necessary for disabled access.

Meanwhile, most parks have instituted other restrictions to encourage social distancing: No picnics, playground use, camping, sunbathing, or contact sports. When visiting parks, people must keep at least 6 feet away from people outside their households and carry masks to slip on in case they hit a congested spot on a trail.

To help people stay safely apart in San Mateo County parks, Calderon said some single-track trails have been converted to one-way-only routes. The county also has temporarily banned bikes on the 15-mile Crystal Spring Regional Trail, one of the Peninsula’s most popular parks. Some 650,000 people annually use the trail, which is typically clogged with hikers, joggers, skaters and parents pushing strollers on weekends and holidays.

“We’re asking bike riders to wait a little longer,” said Calderon, who describes himself as an avid cyclist. “It’s one of those difficult decisions we have to make as we work to meet the public’s needs and provide a safe outdoor experience during a very unusual time.”

Meanwhile, the following restrictions are in place at the following parks:

Santa Cruz County beaches: People cannot visit the beaches from 11 a.m. to 5 p.m. When beaches are open, people can only use them for “recreational activities” that “promote physical and mental health, such as walking, running, cycling and water sports,” according to the county’s website. This means, people cannot sit, lie, or sunbathe. They also cannot bring umbrellas, shade structures, tents, barbecues, coolers, beach chairs or any other equipment they could use for socializing or just hanging out.

East Bay Regional Parks: Trails in most parks remain accessible “on a walk-in, bike-in basis.” Some parking lots and staging areas remain open.

San Francisco: Parking lots at Ocean Beach, Beach Chalet, Marina Green and Little Marina remain closed, as do the Botanical Garden, Conservatory of Flowers and the Japanese Tea Garden in Golden Gate Park. Roads to Twin Peaks are closed.

State parks: As of May 5, 21 state parks and beaches in the Bay Area remain closed, mostly those near the coast, including Big Basin Redwoods State Parks. Others remain open, but vehicle use is banned, and parking lots are closed. That includes in Mount Diablo, Mount Tamalpais, Jack London state parks.

National parks: Muir Woods, Alcatraz Island, Fort Point and a number of visitor centers, parking lots and roads in the Golden Gate National Recreation Area are closed. Other outdoor areas and trails in the national recreation area open to the public. People can use trails and beaches in Point Reyes National Seashore, if they can reach them by foot or bicycle.