 The northern terminus is at an intersection with New Hampshire Route 125 and New Hampshire Route 202A in downtown Rochester.At its southern end, NH 108 connects to Massachusetts Route 108, a very short state route which continues south for to Massachusetts Route 110 in Haverhill.NH 108 is notable in being one of two routes (the other being New Hampshire Route 9) to intersect both U.S. Route 4 and New Hampshire Route 4 (a rare case of two completely separate routes in one state having the same number).