A guided walk will leave at 4:15 p.m. from the Champlain South preserve, which is accessible from the cul-de-sac at the end of Meetinghouse Lane and Library Lane. All are welcome.
After the hike, people will re-group at the Old Lyme Inn, 85 Lyme St., for discounted drinks and appetizers from 5 to 7 p.m. You need not hike to enjoy the Happy Hour.