Here's a link to a State site that will give you some great topo detail once you have narrowed down what you are looking at;
https://wildlife.state.nh.us/maps/topo.html
..and here's another for the smaller lakes and ponds;
https://wildlife.state.nh.us/maps/bathymetry.html
Lastly here is a link to a another retailer in Lincoln that also sells the raised relief maps mentioned;
The Mountain Wanderer. If you cut them carefully at the edges they can be joined together. It is then easy to measure distances and see if a particular mountain that you are looking for might be blocked by a hill or mountain before it.