Now is your chance to learn about some of the fascinating local mammals that live in our forest! Meet us at the tables at the Main Beach to practice your naturalist skills. This program is for all ages. Children should be supervised by an adult. Stop by any time in this 1-hour window. This is a free program, but there is a daily parking fee of $8 per vehicle with Massachusetts plates, $10 for out-of-state plates. Only working guide dogs are permitted in the park. For more information, call (978) 369-3254.