Get your stretch on in the oldest park in the U.S. with free weekly yoga classes taught by Boston area yoga teachers every Thursday from 6–7 p.m. There is no need to pre-register—just bring your mat and join the fun. 

The weekly yoga sessions take place until September 29.

For a list of instructors, check out https://bostonfrogpond.com/spring-summer/free-summer-yoga.