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Marin County Open Space District - Deer Island Open Space Preserve
Deer Island

preserve images




No longer a true island, this preserve rises above the eastern edge of Novato from an area that was once part of the extensive wetlands in the Petaluma River Delta. At just 135 acres, Deer Island can be enjoyed in a short day. Many users walk or jog the relatively level loop trail as a morning or evening exercise routine. This small preserve is just a few minutes from Highways 101 and 37 but it is peaceful and quiet. There are many places along the trails where you can enjoy a reflective moment and appreciate the birds, trees, and flowers that thrive here.

In spring, the grasslands along the ridge come alive with wildflowers such as ground iris and shooting stars. This is also a great place to find many different kinds of butterflies, some of which are dependent on the surrounding marsh habitat.

Remnants of this property’s dairy farming days are visible around the preserve. Weathered outbuildings still stand near the entrance but the small farmhouse is now a ranger’s residence. There is evidence that this location was once the site of a settlement occupied, at least seasonally, by Miwok peoples.

Preserve Map
Species Lists

Featured Species at this preserve:


Grey Hairstreak



Barn Owl



Ground Iris



Yellow Mariposa Lily



The contact for this page is:  parksandopenspace@co.marin.ca.us