To 10 ports; the busiest crossings are to Oakland (25 minutes, about 18 times a day), Larkspur (35 minutes, 17 times a day), Vallejo (an hour, 13 times a day), Alameda Seaplane Lagoon (20 minutes, about 12 times a day), Richmond (California) (35 minutes, 12 times a day), Harbor Bay (25 minutes, about nine times a day), Sausalito (30 minutes, seven times a day) and Tiburon (30 minutes, seven times a day).