Borel Hill and Windmill via Ridge and Ancient Oaks Loop

Trail in Russian Ridge Open Space Preserve · San Mateo County, California

5.5 mi · Loop.

A 5.5-mile loop crossing open grassland and oak woodland, climbing to Borel Hill's 360° panorama—the highest point in San Mateo County—before dipping through a shaded grove of 300-year-old oaks near Mindego Hill's windmill views.

More in Russian Ridge Open Space Preserve — campgrounds, fees, and typical weather. Get the Explore app for offline maps and live conditions. Data sources.