Potter's Field Trail Walk, Potter's Field Trail, Knight Street and Pontiac Avenue, Cranston.
All programs require advance registration.
Summer Solstice Firefly Walk, Rhodes on the Pawtuxet, 467-8271. Whales of the Bay, Save the Bay, 272-3540. July 8, noon-6 pm. No pets, bicycles or other vehicles allowed at these wildlife refuges. Nature walks, workshops, children's activities and other programs offered.