Windy Hill Open Space Preserve is a 1,335-acre park located in Portola Valley, California. The preserve is owned and operated by the Midpeninsula Regional Open Space District, which manages over 63,000 acres of public open space in the San Francisco Bay Area.
Windy Hill is named for its distinctive, breezy grass-covered hilltop, which can be seen from many areas of the peninsula. The 1,414-acre preserve features open grassland ridges and forests of redwood, fir, and oak.