Massachusetts Dept. of Conservation & Recreation
The Department of Conservation and Recreation has a wonderful page with links to outdoor activities available to disabled people. Here is their schedule of Activities – mostly adaptive kayaking. This is a good downloadable Brochure on Accessibility in the State Parks . It lists accessible trails and other amenities and tells which state parks have them. There are many more than the few I have made posts on, so be sure to look up these other accessible Parks in Massachusetts.