There is the Derry/Windham Rail Trail that goes for miles and is a very nice path, most of which is paved. There is also a dog park in Derry by the Transfer Station, which has a large area and a small area with running water. If you need anymore info about Derry, please let me know I have been in the Derry area for over 7yrs and also grew up here. I am a full time Realtor for Century21 in Southern NH, my direct line is 603-553-7730 give me a call if I can help.
Century21 North Shore