ANNOUNCEMENT: U.S. Army Corps of Engineers, New England District Recreation Sites Mask Policy

The mask policy at U.S. Army Corps of Engineers, New England District recreation sites is based on local and state-specific guidance and requirements. Visitors to our parks and facilities need to ensure they are following the latest applicable local and state guidance.

Recreation Facilities/Activities

Northfield Brook Lake is located in a scenic area adjacent to the highly industrialized Naugatuck Valley, a region where public recreation is at a premium.  

The importance of the 208 acres of public land is evident on a warm summer weekend when people gather at the park to enjoy hiking, picnicking and other outdoor activities.

Northfield Brook Lake also has two picnic shelters which may be reserved by groups for a modest fee. Shelter reservations may be made on the internet at or by calling toll free 1-877-444-6777. The reservation assures you a dry spot for your organized functions. The park also has picnic tables, grills and horseshoe pits.

The 1.7 mile long hiking trail starts at the main recreation area parking lot, the 8 stationed self guided interpretive trail follows the brook up stream. Continue across the road and follow the trail, you will cross over a stream as it winds its way up the hillside. Along the crest of the hillside you enter a mature forest with its tall trees reaching for the sky. As you descend the steep hillside you will return to the main recreation area.

Each year the eight-acre lake is stocked with trout by the Connecticut Department of Energy and Environmental Protection. Warm water fish, including bass, are naturally found in the lake.

In addition to the these activities, special interpretive programs on the natural resources, water resources, water safety and flood control are provided by Park Rangers.

Fee and Reservations

Northfield Brook Lake also has two picnic shelters which may be reserved by groups for a modest fee. Shelter reservations may be made on the internet at or by calling toll free 1-877-444-6777

Special Events

Northfield Brook Lake has been a site for special group use events such as scouting and military use. Special Use Permits can be issued for group events of this type. Please call or email for more information.

Interpretive Programs

Park Rangers at Northfield Brook Lake can conduct group programs upon request. Park Rangers can prepare for you programs on topics like the Water Cycle, The History of the Corps of Engineers, Dam Tours, and Nature Walks that focus on identifying specific water or natural resources. Rangers can also prepare a program that deals with the Corps of Engineers and its missions, Career as a Ranger and much more. These programs can be tailored to your needs. If you would like more information on any of these programs or to schedule a program please contact us.

Northfield Brook Lake offers a variety of educational and recreational programs in the summer months. The programs are generally scheduled for Saturday or Sunday. These family-oriented activities range from safety programs on Water Safety to Flood Control discussions where you learn about the Corps of Engineers, its history, and take a tour of the dam. You can take a guided Nature Walk where you learn about the local wildlife, plant-life, and much more about our natural resources. Programs are open to the public. All ages are welcome; however, we do ask adults to accompany their children.

Natural Resources

The natural resources on the 208 acres of undeveloped public land at the lake are managed for recreation, forest and wildlife resources.

Corps employees and Scouts have been successful in reclaiming the large borrow area on the hillside at Northfield Brook. This reforestation not only has improved the aesthetics of the area, but also controlled the once prevalent erosion problem. Certain areas are kept open to create habitat diversity. The plant that grows along the edge of the forest and the open fields are especially beneficial to wildlife.

Wildlife is abundant in the reservoir area. White-tailed deer, beaver, red fox, raccoon, grey squirrel and cottontail rabbits either live or visit project lands. Birds spotted at Northfield Brook Lake include Canada and snow geese, wood ducks, great blue heron, osprey and American Kestrel.

Updated: May 25, 2021





  • Special Notice - Thomaston Dam, Northfield Brook Lake, Black Rock Dam Areas Reopening

  • Due to COVID-19, the park will remain closed to vehicles indefinitely.  The recreation area is open to foot traffic only.  Please maintain social distancing and practice gatherings of no more than 5 people.  Both group shelters are closed.

  • The Army Corps has been working hard to offer better facilities to our visitors. Starting for the 2020 season, visitors will see several improvements.  The shelter by the lake (formerly shelter #2) has been demolished and replaced with a new shelter now named Humaston Falls shelter.  The shelter is available for reservations through   Park staff are finishing up several improvements to the shelter, which include electricity.

  • Visitors will soon be able to use new horse shoe pits, as well as a sand volley ball court located near Humaston Falls shelter.

  • USACE is in the process of installing a waterline which will allow us to reopen flush bathrooms at this recreation area.  Please check back frequently for updates. 

  • USACE is in the process of working with NEMBA (New England Mountain Bike Association) to develop mountain biking trails on the grounds.

  • All pets must be in the owner's control and on a leash of six feet or physically restrained.

  • Please, no parking in front of yellow gates.

- Updated: June 26, 2020



Northfield Brook Lake
1550 Northfield Road, Rt. 254
Thomaston, CT 06787
Phone: (860) 283-5540
Northfield Brook Lake Directions