A 3-mile trail parallels the Winnipesaukee River and passes the historic Sulphite upside down covered bridge believed to be the only one in the country and listed on the national register of historic places. You will also view mill ruins and remaining portions of dams that tell the history of the 5 mills that operated on this river in the mid 19th century.

The trail is open to all non motorized users and runs from the historic rail road trestle in Franklin to the Surrett Battery property just off Park Street in Northfield. In that area you can also view the collection of antique rail cars and cabooses that operate on the local scenic railway.

For parking, as you pass the old train station you will see an unmarked street on your right. Turn right and follow down and around to the left. You will come to a small park on the river with plenty of parking. The entrance to the trail is well marked and starts through a gate in the chainlink fence.