Skyline To The Sea Trail is a hiking, biking, and horse trail in San Mateo County and Santa Cruz County, California. It is within Big Basin Redwoods State Park, Long Ridge Open Space Preserve, West Waddell Creek State Wilderness, and Castle Rock State Park. It is 23.7 miles long and begins at 2,624 feet altitude. Traveling the entire trail is 6.7 miles with a total elevation gain of 1,911 feet. The 3. Opal Creek, 1. Redwood Circle, 10. Madrone, 11. Meadow, and 2. Old Circle information guideposts and the Campfire Center theatre are near the trailhead. There is also an industrial. The 4. Tanbark Oak information guidepost, the Waterman Gap Trail Camp, Twin Redwoods Trail Camp, and Camp Herbert Trail Camp (permanently closed) camp sites, the Statue Of Responsibility tree, and the Scherwin Grove can be seen along the trail. There are also an emergency phone, picnic sites, parkings, bbqs, water towers, a recycling, a wood, a scree, a residential, an information board, and a forest along the trail. The trail ends near the W. Ernest Jones, Jr. Grove wood.