Colebrook River Lake, Connecticut & Massachusetts, USA

Also known as:  Colebrook River Reservoir

Welcome to the ultimate guide to Colebrook River Lake — things to do, where to stay, fun facts, history, stats and more. Let’s dive in!

Topics we cover in this article:

Looking for Colebrook River Lake cabins or other accommodations? Save time and use this interactive map to find, compare and book at the best rates. Or explore our comprehensive list of favorite travel partners.

All About Colebrook River Lake

With over 800 acres of boating and fishing waters, with no residential development, Colebrook River Lake – straddling the Connecticut and Massachusetts state line – is an ideal leisure-time destination. Colebrook River Lake provides many excellent recreational boating and fishing opportunities, including a boat ramp. The Lake is located in Colebrook, Connecticut with the northern end extending into Massachusetts near New Boston. The original Route 8 yields a seven mile drive around the lake (at lower water levels) and many visitors come here for the spectacular fall foliage season. Beautiful views will be encountered from the dam and within the reservoir confines.

The U.S. Army Corps of Engineers created Colebrook River Lake by building a flood control dam, impounding the West Branch of the Farmington River. It was built as part of the Corps network of flood control dams on Connecticut River tributaries. Construction of the Dam was completed in 1969 and it can store over 16 billion gallons of floodwater. As a flood control lake, the water level can fluctuate significantly. Under a Federal License, a 3.3 megawatt hydroelectric power plant was built by the Hartford Metropolitan District Commission in 1989, selling power to the Connecticut Light and Power Company.

Colebrook River Lake is quite popular with anglers for its stocked brown and rainbow trout, a good number of ‘keepers’ are caught each year. The Connecticut rock bass record from the lake is 1 pound 3 ounce, set in 1989. In addition to trout, Colebrook River Lake provides excellent sport fishing for large and smallmouth bass, northern pike, chain pickerel, pan fish and catfish. There’s nothing like leaning back in your boat with your lure presented to the trout and watching the gorgeous shores of the lake.

Fine boating is a major enjoyment on the gorgeous waters of Colebrook River Lake, although water sports are not allowed with anything faster than 20 mph. The large boat launch ramp maintained by the U.S. Army Corps is on the western shore and has rudimentary facilities. For the geocacher, there are over 100 geocaches nearby – lots of ‘finds’ available. Wildlife viewing includes deer, black bear, red fox, raccoon, mink and muskrats. The fortunate ‘birder’ may see osprey, great blue heron, egrets, turkey, ruffled grouse and bald eagles.

Colebrook River Lake is for the outdoor person, angler or someone who just wants some peace and quiet with the added benefit of superb views – it’s a wonderful experience of nature’s best, not to be missed.

Reference: A Fisheries Guide to Lakes and Ponds of Connecticut, published by the Department of Environmental Protection, Hartford, Connecticut, 2002

Things to Do at Colebrook River Lake

  • Fishing
  • Boating
  • Wildlife Viewing
  • Birding

Fish Species Found at Colebrook River Lake

  • Bass
  • Black Bass
  • Catfish
  • Chain Pickerel
  • Northern Pike
  • Pickerel
  • Pike
  • Rainbow Trout
  • Smallmouth Bass
  • Sunfish
  • Trout

Find Places to Stay at Colebrook River Lake

If you’re considering a Colebrook River Lake lake house rental or hotel, we’ve made it super easy to find the best rates and compare vacation accommodations at a glance. Save time using this interactive map below.

Recommended Sites to Book a Colebrook River Lake Vacation

If you want to take a deeper dive to find waterfront lake cabins, cottages, condos, hotels or resorts, check out our favorite Colebrook River Lake lodging partners.

  • VRBO – Use VRBO to find the perfect lake rental home, condo, cabin, cottage or other vacation property.
  • – One of the world’s leading digital travel companies, connects travelers to everything from cozy B&Bs to luxury resorts.
  • Expedia – Expedia is a popular online travel agency with more than 140,000 lodging properties worldwide.
  • – With more than 325,000 hotels in 19,000-plus locations, is an industry leader in online accommodations.
  • TripAdvisor – Read traveler reviews and compare prices on hotels, vacation rentals and more at TripAdvisor.
  • Trivago – Trivago helps travelers compare deals for hotels and other accommodations from a variety of booking sites.
  • KAYAK – KAYAK scours hundreds of other travel websites at once to find the best deals on hotels and other travel-related services.
  • RVshare –RVshare connects travelers interested in renting a motorhome with owners who have RVs to rent.
  • CampSpot – Campspot offers premier RV resorts, family campgrounds, cabins and glamping options across North America.

Note: These are affiliate links so we may earn a small commission if you book through them. While there is no extra cost to you, it helps provide resources to keep our site running (thank you)! You can read our full disclosure policy here.

Colebrook River Lake Statistics & Helpful Links


Lake Type: Artificial Reservoir, Dammed

Water Level Control: Army Corps of Engineers

Surface Area: 826 acres

Normal Elevation (Full Pond): 708 feet

Average Depth: 53 feet

Maximum Depth: 136 feet

Water Volume: 43,778 acre-feet

Drainage Area: 118 sq. miles

Trophic State: Oligotrophic

We strive to keep the information on LakeLubbers as accurate as possible. However, if you’ve found something in this article that needs updating, we’d certainly love to hear from you! Please fill out our Content Correction form.

Shop Colebrook River Lake Gifts

Custom Lake Tumblers

Captain / First Mate Custom 20 oz Tumbler

Custom Lake T Shirt

Personalized My Boat My Rules Unisex T-Shirt

Custom Lake Coffee Mug - On Lake Time

On Lake Time Custom Coffee Mug – 11oz or 15oz


Advertise Your Colebrook River Lake Business or Vacation Rental

LakeLubbers will soon offer businesses the opportunity to advertise and homeowners and property managers the ability to showcase their vacation rentals to the thousands of lake lovers searching our site daily. If you would like additional details, please contact our advertising team.


Looking for the Colebrook River Lake Forum?

LakeLubbers previously offered visitors the ability to create accounts and participate in lake forums. When we overhauled the site’s content management system in 2021 we had to disable those features. We’re evaluating options and welcome your comments and feedback here. We also encourage you to join our lake-lovin’ community on Facebook, Instagram and Pinterest!

Colebrook River Lake Photo Gallery

New photos coming soon!

Spread the word! Share our Colebrook River Lake article with your fellow Lake Lubbers!