Old Page Mill Trail is a hiking, biking, and horse trail in San Mateo County and Santa Clara County, California. It is within Skyline Ridge Open Space Preserve and Skyline Ridge Open Space Preserve (Closed Area). It is 1.7 miles long and begins at 2,249 feet altitude. Traveling the entire trail is 0.1 miles with a total elevation gain of 37 feet. The trail ends near the David C. Daniels Nature Center museum. There are also an information guidepost, a pier, drinking water, a bicycle parking, benches, and a picnic site near the end of the trail.