Bay Circuit Trail

Trail Maps

• Bay Circuit Interactive Map
• Bay Circuit and Boroughs Loop Connector Trail Map (PDF)

About the Trail

The Bay Circuit Trail (BCT) is a permanent recreation trail and greenway corridor extending through 34 towns in Eastern Massachusetts and linking parks and open spaces in 57 Boston area communities - 200 miles from Plum Isalnd and Ipswich to the Duxbury/Kingson Shore.

The Southborough section of the Bay Circuit Trail connects from Oak Hill Road through the forest behind Staples office park and crosses over Route 9 and onto Route 30. The Bay Circuit Trail Connector, from Route 30 to Clemmons/Nichols Street, was developed as a more direct route through the forest next to Stony Brook and the Fayville Dam that connects to Clemmons/Nichols St and bypasses having to walk along Route 30 and Pinehill Road. The connector opened in September 2020. You can park along the shoulder of the road at the intersection of Nichols Street. The Bay Circuit Trail is a beautiful section of trail that runs along the Sudbury Reservoir for about 2.25 miles until you reach Parmenter Street in Marlborough. The trail continues to connect to other trails in Callahan State Park. The trail is great for walking, trail running, snowshoeing, and cross-country skiing. No motorized vehicles or dog walking.

Bay Circuit Trail Connector (Reopened September 2020)

Bay Circuit and Boroughs Loop Connector Trail Map (PDF)

The Bay Circuit/Boroughs Loop Connector Trail is 0.7 miles wooded trail that can be accessed from the intersection of Clemmons and Nichols Street in Southborough (where there is parking available). The trail is located near the Sudbury Dam Historic District and includes stunning views of the reservoir, Fayville Dam, and Stony Brook. The section of trail joins two existing BCT/BLT segments, eliminating the need to walk along Pleasant Street (Route 30), Pinehill Road, and Clemmons Street. No dogs permitted on this section of trail.

Thank you to the volunteers and partnering organizations who help make this trail possible: Trails Committee members (past and present), Bay Circuit Trail Work Group, community volunteers, Massachusetts Water Resources Authority, Massachusetts Department of Recreation and Conservation, Southborough Recreation, and Framingham Parks and Recreation. A special thanks to the former Trails Committee members for their vision and efforts putting the permit in place and laying the groundwork for this trail to be built.