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Shell Ridge Open Space
Acorn Woodpecker in Shell Ridge
Open Space Bluebird family
The elusive bobcat!
Volunteers have all the fun!
Open Space bush rabbit
Mount Diablo Sunflower in Lime Ridge
California Poppies in the Spring
Monarch Butterfly
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The Walnut Creek Open Space Foundation works to preserve and enhance Walnut Creek's 2700 acres of open space and to educate area residents so that they can enjoy this wonderful resource. Learn more...

Foundation Sponsored Talk: From Butterflies to Bears: Oaks as Nature's Most Generous Trees

Speaker: Author Kate Marionchild
Date: Sunday, May 31, 2026
Time: 2:30 to 4:00pm
Location: Walnut Creek Library, Oak View Room

In this richly illustrated presentation, Kate Marianchild, author of Secrets of the Oak Woodlands: Plants and Animals among California's Oaks, will extol the fascinating features of some of the myriad species that depend on oaks and will discuss why and how oaks became so popular.

In addition to her oak identification guides and recommended binoculars, Kate will also have copies of her book available for sale and will sign the books for you.

Note: seating will be limited, so please register as soon as possible for your free tickets by clicking on the button below.

NOTE: Only cancelled reservations will be available, if/when they happen. We are now full!

Register

Join Our Meetup Group!

New Open Space Guide Available - Fond Memories

Every Tuesday Morning - 9am to 12pm - WCOSF Tuesday Group meets to complete various activities in the Open Spaces

Every Saturday Morning (Dedicated Group Only) - 9am to 12pm - Fossil Hill Restoration in Shell Ridge

Second Monday of the Month - 9am to 12pm - Monthly Nursery Group at the Native Plant Nursery

Every Wednesday Morning - 9am to 12pm - Wildlife Habitat Restoration Group in North Lime Ridge