Each year. MassWildlife stocks nearly 500,000 brook, brown, rainbow, and tiger trout from its five hatcheries in Sandwich, Palmer, Belchertown, Sunderland, and Montague. Visit Mass.gov/Trout to get the latest information. Find a specific waterbody or town using the sortable list, or explore new areas with the interactive map. Remember to buy your freshwater fishing license before you hit the water.