Plum Island Sound

Surf the shifting tides near the mouth of the Ipswich River, paddle the clam-rich shores near Middle Ground, or continue toward the Parker River and head deep into the Great Salt Marsh from the narrow end of Plum Island Sound. Depending on tides and time of day, the water can keep the fittest paddler working, or offer peaceful refuge from the breaking waves and weekend crowds on the ocean side of Plum Island.

Plum Island Kayak, 38R Merrimack St., Unit 101B, Newburyport, 978-462-5510, www.plumislandkayak.com.