U. S. Highway 3

Connecticut Lakes State Forest, New Hampshire – Boston, Massachusetts
Longest Mileage: 278
Current Mileage: 245

U.S. 3 traced on a 1953 National Geographic Map

U.S. 3 is one of the original 1926 highways. Its current route has been in place since 1940 and runs through New Hampshire and Massachusetts.

New Hampshire – 195 Miles
Massachusetts – 50 Miles