The Van Hoosear Wildflower Preserve is a private nature reserve

Nature reserve

A nature reserve is a protected area of importance for wildlife, flora, fauna or features of geological or other special interest, which is reserved and managed for conservation and to provide special opportunities for study or research...

 on Carriger Creek

Carriger Creek (Sonoma County, California)

Carriger Creek is a stream Sonoma County, California. Southwest of the city of Sonoma, California, its name changes to Fowler Creek. This article covers both parts of the creek....

 in southern Sonoma County, California

Sonoma County, California

Sonoma County, located on the northern coast of the U.S. state of California, is the largest and northernmost of the nine San Francisco Bay Area counties. Its population at the 2010 census was 483,878. Its largest city and county seat is Santa Rosa....

, USA. Van Hoosear was created to allow animal migration and ecological connection between Sonoma Mountain

Sonoma Mountain

Sonoma Mountain is a prominent landform within the Sonoma Mountains of southern Sonoma County, California. At elevation of , Sonoma Mountain offers expansive views of the Pacific Ocean to the west and the Sonoma Valley to the east...

 and the floor of the Sonoma Valley

Sonoma Valley

Sonoma Valley is the birthplace of the California wine industry and often called The Valley of the Moon. Sonoma Valley is home to some of the earliest vineyards and wineries in the state, some of which survived the phylloxera epidemic of the 1870s and the impact of Prohibition...

. This 163 acres (66 ha) preserve has been established with an endowment fund to allow perpetual management; access to the preserve is controlled by the Sonoma Ecology Center.