Doane Rock is a glacial erratic located in Eastham on the grounds of the Cape Cod National Seashore. It is the largest exposed boulder on Cape Cod. It stands 18 feet high and extends below the ground an estimated 12 feet.

This boulder is named after Deacon John Doane, one of Eastham’s original settlers. It has also been called Enochs or Enos Rock for the deacon’s son, as well as Great Rock. The rock was left by the glaciers (Laurentide Ice Sheet; 18,000-12,000 years ago) between what is now the Salt Pond Visitors Center and Coast Guard Beach.

Doane Rock is located just off Doane Road about one mile past the Salt Pond Visitor Center on National Park Service land. Limited parking is available near the rock.

Cape Cod is a large peninsula extending 60 miles into the Atlantic Ocean from the coast of Massachusetts. Located on the outer portion of the Cape, Cape Cod National Seashore’s 44,600 acres encompass a rich mosaic of marine, estuarine, freshwater, and terrestrial ecosystems. These systems and their associated habitats reflect the Cape’s glacial origin, dynamic natural processes, and at least 9,000 years of human activity. Geomorphic shoreline change, groundwater fluctuations, tidal dynamics including rising sea level, and atmospheric deposition are among the many physical processes that continue to shape the Seashore’s ecosystems. Marine and estuarine systems include beaches, sand spits, tidal flats, salt marshes, and soft-bottom benthos. Freshwater ecosystems include kettle ponds, vernal pools, sphagnum bogs, and swamps. Terrestrial systems include pitch pine and scrub oak forests, heathlands, dunes, and sandplain grasslands. Many of these habitats are globally uncommon and the species that occupy them are correspondingly rare.