Here's my route to Boston:
You may wish to consider a route change to the Atlantic Coast Route that will be a little more in keep with the route name. This change will take a rider along a little less traveled path and further along the eastern seaboard.
The route will be a little flatter and, several State Parks, campgrounds and amenities along the way.
From Portsmouth N. H along Rt. 1A South, several State Parks with water, toilets and one park in particular has an off- road path part of the way.
Groceries can be had in Hampton Beach along with banks, motels, B&B’s
Along 1A in Seabrook, you pass a fairly large supermarket.
Salisbury S. P. in MA. Is not far from Seabrook.
Leaving Salisbury, along Rt. 110 West, to Ferry Road. Turn LEFT onto Ferry Road and follow to end, to reconnect to Rt. 1A and cross bridge into Newburyport. Check out Plum Point NPS
Follow 1A South towards Rowley. Connect to Rt. 133 to Ipswich (hilly) and on to Gloucester (hilly) 2 campgrounds in Gloucester. Cape Ann CG is along a hilly winding road and he campsites are up a steep hill. Showers, store. Beach about a mile away. Services in town. I only passed the other campground so I don’t know what services they have. Motels nearby and the MBTA Commuter train is nearby with bikes allowed only on off peak hours.
Leaving Gloucester, take Rt. 133 to Magnolia (1 hill) and follow to Rt. 127 South towards Beverly. Some facilities in Beverly. Follow towards Rt. 1A and cross over bridge into Salem. Hotels / Motel and 1 town campground ( Winter Island)
Free showers, boat landing, store, beach on-site. Tourist trolley comes into the campground. When coming into Salem, look for the power station smokestack and head in its direction. Many services in Salem. ( I will send the Salem section as soon as I can get it scanned).
The Reubels bike maps can get you around without using the “T” from Revere Beach
I used the “T’ to get into Boston. The Beachmont station has an elevator to get you to the train platform. Taking the Blue line puts you near Boston’s South Station and the North Station is about a mile away. From here you can connect to the Boston Spur. If one would wish to, they could take the commuter train (off peak) to Worcester. Heading towards Sturbridge there are motels along Rt12 and Wells State Park for camping off RT. 49. In Sturbridge, routing can be made to get one towards Stafford Springs in Conn.