The Millers River is a medium-sized freestone stream flowing approximately 50 miles through north-central Massachusetts before joining the Connecticut River. Once considered the best trout stream in Massachusetts, it suffered from industrial pollution in the mid-20th century but has since recovered significantly. The river features varied water types from fast-moving sections with pocket water to deeper pools and runs. There are two dedicated catch-and-release sections with artificial lures only regulations that hold good populations of wild and holdover trout. The river is heavily stocked each spring and offers year-round fishing opportunities, though summer temperatures can limit trout activity to early mornings and evenings during the hottest months.