Need some fresh air after last night’s reverie? A 4-mile hike takes place on moderately hilly terrain in one of the most beautiful preserves on eastern Long Island. See glacial erratics, Mulvihill Pond, streams and vernal ponds, and one of the oldest American Beech Trees on Long Island. This 2-hour hike is co-sponsored with the Southampton Preservation Trails Society and led by Tim Corwin, (631) 204-7821.