Fresh Water Beaches - Merrimack Valley Region NH

State park of nearly 10,000 acres, offering hiking, biking, swimming and fishing are a few of the favorites. Canoe rentals at Beaver and Catamount Ponds, while rowboat rentals are also available at Beaver Pond. Fly-fishing at Archery Pond. The park is open weekends starting in late May; then daily June through September. Call or check Web site for exact opening and closing dates. A day-use fee is collected at the toll booth near Catamount Pond.
See full description of Bear Brook State Park

Located about five miles east of the town of Weare, Clough State Park is located on the shore of Everett Lake, about five miles east of the town of Weare. Features include a 900-foot sandy beach with two bathhouses, flush toilets and changing areas; picnic tables in a large picnic grove. Admission is $4 a day for adults and $2 a day for children. 

Nice swimming beach on Pawtuckaway Lake, along with plentiful water sports and boat rentals. See full description of Pawtucketaway State Park.