Squannacook River

River Map

About Squannacook River

A 16-mile cold-water freestone stream in northern Massachusetts that drains a forested, spring-fed watershed through Groton before joining the Nashua River. It offers exceptional diversity — fast freestone runs, deep pools, and spring-fed tributaries filled with native brook trout — and supports naturally reproducing trout populations that survive year-round in its cold water. Often overlooked by out-of-state anglers, it is a reliable four-season fishery with both stocked and wild fish throughout its length.

Regulations

Standard Massachusetts trout regulations apply: season opens April 1. MassWildlife stocks brown, rainbow, and brook trout each spring and fall; many cold tributaries hold self-sustaining wild brook trout year-round. No designated fly-only or mandatory C&R sections on the main stem.

Learn More

Guides to help you fish Squannacook River with more confidence.

• Massachusetts Fishing Regulations for Fly Anglers

  Massachusetts fishing license (no separate trout stamp), the April 1 spring opener, year-round catch-and-release on the Swift fly-only stretch, the…

• Trout Species of Massachusetts

  MA's wild brown trout fishery — the Swift below Quabbin, the FirstLight-controlled Deerfield, the Westfield Wild and Scenic corridor — alongside…

• How Barometric Pressure Affects Fishing (And How to Use It)

  That gorgeous bluebird day after a cold front? Worst fishing of the year. Here's the data behind why pressure changes matter more than the weather…