• Horseback riders at Tolay Lake 1900

    Explore Sonoma County's largest park, now open daily 

  • Stillwater Cove trail 1900

    Hike among coastal redwoods

  • Two children taking a nature walk at Spring Lake 1900

    Connect with nature on a family hike

Laguna de Santa Rosa Trail in January

New Year, New Members

Did you get a Regional Parks membership as a holiday gift? Activate your membership online to start exploring the parks in 2019 with free parking and other member benefits.

Become a member

Bajo Las Estrellas program

Connecting Families, Communities to Parks

Our Spanish-language programs like "Nuestros Parques" and "Bajo Las Estrellas" support efforts to make parks accessible and welcoming. This video shows why we love hosting these hikes and camping trips.

Watch the video

Tolay sunrise on East Ridge

Tolay Lake Regional Park is Open Daily

Sonoma County's largest park is now open from 7 a.m. to sunset every day. Plan a visit to this unique, 3,400-acre park southeast of Petaluma. 

Learn more

Helen Putnam in spring

Your Guide to Spring Fun

Download our spring activities guide and join dozens of outings - wildflower walks, birding, history hikes, whale watching, and yoga.

Get your activities guide

  • When: March 30, 2019 from 10:30 AM 3:00 PM

    Tolay Lake Regional Park
    Please join us to commemorate the opening of Tolay Lake Regional Park. We will acknowledge the many contributions that created Sonoma County's largest park and celebrate the parkland's past, present and future with hikes, cultural demonstrations, farm activities, food, music and more.

  • More Events

Latest News

  • Published on March 22, 2019

    The following parks and trails are closed due to flooding or storm-related safety issues: Guerneville River Park, Sunset Beach River Park, Forestville River Access, the trail between Lake Benoist and Lake Wilson at Riverfront Regional Park, the South Ridge Trail between Vista Point and Canyon Trail at Shiloh Ranch Regional Park, Tolay Lake Causeway Trail, and Ragle Ranch back country trails.

  • Published on December 5, 2018

    The previously announced March 9 Mark West Creek Regional Park preview day has been postponed. We are working to begin offering the preview days later this spring. Once a date is confirmed, we will announce the details on our  activities calendar and  social media and in our  e-news. Advance registration will not be necessary.