How to reach:
To reach the tidal bench marks from the Post Office in Gualala, proceed SE on Highway 1 for 10.1 km (6.3 mi) to Headlands Reach, turn right on Headlands Reach and proceed 0.3 km (0.2 mi) SW to the end of Headlands Reach at the intersection with Green Cove Drive. Park and continue on foot 150 m (490 ft) SW on a dirt trail to a rock headland. The tide gauges were located on the bare rock outcrop below the edge of vegetation and the orifices were located on a rock wall on the south side of the rock headland. The bench marks are located within 0.5 km (0.3 mi) along the rock shoreline.