June 16 One-hour Patuxent Excursions aboard the Roughwater, a working waterman's boat, departs 12:30 p.m., 2:00 p.m. and 3:30 p.m. from Lore Oyster House on the main campus of the Calvert Marine Museum, Solomons, Md., $20, preregistration required, limited to six passengers per outing, (410) 326-2042 ext. 41. www.calvertmarinemuseum.com.
