How many boat & kayak launches are in Groton, MA?
1 boat launch in Groton, MA are listed here: Petapawag Canoe Launch. Each page has parking, entry fees, and hours where they are confirmed, and says so where they are not.
Which boat & kayak launches in Groton, MA are free to enter?
Petapawag Canoe Launch. Free entry is confirmed for this one; the others either charge or have no confirmed fee on record.