How to reach:
To reach the tidal bench marks from the interchange of the Florida Turnpike and U.S. Highway 1 in Florida City, proceed north on U.S. Highway 1 for 1.0 km (0.6 mi) to Lucy Street, then east on Lucy Street (which becomes SW 328th Stree) for 14.2 km (8.8 mi) to the boat ramp at Biscayne National Park. From there, proceed by boat SSE on Biscayne Bay for 15.8 km (9.8 statute mi) to Pumpkin Key. The bench marks are on the north, east, and south shores of Pumpkin Key. The tide gage and staff were on the west end of the northernmost boat pier located on the south end of the Key.