It’s hard to imagine that the Nashua River Rail Trail needs any introduction, seeing the number of cars crowding the parking lots on sunny summer Saturdays.

There are other rail trails in the region, too, and still more are in the planning stages. That’s good news for people who like to get outside. Rail trails are terrific places for family bicycling (look, ma, no cars!), in-line skating, running or even just an evening stroll.