New Hampshire Route 4 is a 3.78 mi state highway located in eastern Strafford County, New Hampshire. Its western terminus is at an intersection with New Hampshire Route 9 and New Hampshire Route 108 in Dover. Its northern terminus is at the Maine state border in Rollinsford, where it continues as Maine State Route 4.
New Hampshire Route 4 is paved 
New Hampshire Route 4 is a state highway, it follows that it must be a paved road