Beaver Brook Spray Deck

Beaver Brook Spray Deck is a free, state-run water-play spot at Beaver Brook Reservation, right off Trapelo Road on the Waltham/Belmont line. On hot summer days, ground jets and sprayers give little ones a easy, no-cost way to cool off, and there's a playground, open lawn and picnic areas right alongside for a full afternoon outdoors. It runs seasonally through the warm months, and there's no admission fee or reservation required — just show up with water shoes and a towel.