Monomoy: North Island Circumnavigation from Harding Beach Professional Review and Guide
"Sea kayaking or canoeing at Monomoy usually turns into hiking, said AMC Cape Cod paddler Chuck Wright—if, that is, you’re paddling on the west side at low tide. Within an hour after launch from Harding Beach, you may find yourself splashing through a couple of inches of water, towing your kayak, then portaging over about 300 feet of sand to reach the channel break between Monomoy’s two islands. You can probably see the opening clearly enough, but you can’t get there from here. The situation is not quite as baffling at high tide, when you can paddle closer to shore.
North and South Monomoy Islands trail south off the elbow of Cape Cod and together make one of the longest barrier beaches (9 miles) in the state. Formed during the last century by sand drifting down from north beaches, Monomoy still shifts, eroded by the North Atlantic, and seeks new spots to deposit itself. In 1958, Monomoy parted from the mainland, and in 1978 the island split in two. Twenty years ago, Nauset Beach, which extends to the east of Monomoy, ended at the north end of South Island."