Some links may be out of date. Although this material is not rigorously maintained, we provide it in the hopes you might find some of it useful. There are several outdoor activities that one can pursue in the New England area.
Runners can join the Boston marathon, held early in spring.
Harvard University has a lot of sports facilities available for their staff and students. There are also many fitness centers in the Boston area. It has a lot of info. Northern Maine generally peaks from mid to late September, the Western region around the beginning of October and the southern and coastal regions the beginning of October through Columbus Day. Average peak season is the last week in September and first two weeks in October.