This Saturday, Sept. 18, explore one of the rarest plant and animal assemblages in the commonwealth, right here in your own backyard.

Created in 1908 as a “Heath Hen Reservation,” the Manuel Correllus State Forest continues to thrive as a vital and diverse ecosystem.

Tim Boland, executive director of the Polly Hill Arboretum, will be the guide during this two-hour walk, which will begin at the West Tisbury School.

The tour, or rather casual stroll, is from 1 to 3 p.m. The cost is $15, or $10 for arboretum members.

To register and for more information, call 508-693-9426.