The routes total 101 miles of coastal and rural roads.
The longest, the 45-mile Upper Lamprey River Scenic Byway, passes through Candia, Deerfield and Northwood and features panoramic views of mountains and farms and forests.
The 44-mile Robert Frost/Old Stagecoach Byway celebrates the history of the original Boston-Haverhill-Concord stagecoach route and the landscape written about by Robert Frost. It follows Route 121 north through Hampstead, Sandown, Derry, Chester, and Auburn to Massabesic Lake.
From there, it proceeds southward, passing through Derry and the Robert Frost Farm Historic Site, and connects back to Route 121.
The 12-mile Mills Scenic Byway goes through Newmarket, Durham, Madbury, Dover and Rollinsford and connects two other byways, the Coastal and Independence. It, too, has panoramic views of hills bordered by forest land and stone walls cut through by brooks and marshes.
The three byways join an existing system of 15 state and nationally designated scenic and cultural byways in New Hampshire that total over 1,000 miles of roads featuring historical and culturally significant sites.
The statewide programs are tied directly to the National Scenic Byways Program and are eligible to seek federal funding.