The Purisima Creek Redwoods Open Space Preserve is located on the western slopes of historic Kings Mountain in Woodside, California. This 4,471-acre preserve was established with a $2 million gift from the Save the Redwoods League. Purisima Creek and several of its tributaries flow through the preserve. The main entrance for the Purisima Open Space is off the Skyline Boulevard section of State Route 35.