 The western terminus of NH 103 is in Claremont at the New Hampshire–Vermont state line on the Connecticut River, running concurrently with New Hampshire Route 12.After intersecting with New Hampshire Route 12A, the road continues eastward for into the center of Claremont, where NH 103 splits off from NH 12 and merges with New Hampshire Route 11.The highway then runs eastward merged with NH 11 for a distance of .