Large rock formation north of Opal Creek is 0.28 miles from here , in Big Basin Redwoods State Park Large rock formation north of Opal Creek is 0.28 miles from here , in Big Basin Redwoods State Park Above Opal Creek is 0.28 miles from here , in Big Basin Redwoods State Park Above Opal Creek is 0.28 miles from here , in Big Basin Redwoods State Park Skyline to the Sea trail below China Grade is 0.75 miles from here , in Big Basin Redwoods State Park