• Witches, ghosts and ghouls are all welcome at this year’s Halloween Sausalito, which kicks off with a parade from the Station 1 fire station to Robin Sweeny Park at 6 p.m. Tuesday. To join in on the fun, meet at 5:45 p.m. near the fire station at Johnson and Caledonia streets. After arriving at the park, see what goodies you’ll get at Trick-or-Treat Lane on the park’s basketball courts around 6:15 p.m. And your dogs can get in the fun, too, with the Howl’O’Ween Dog Costume Contest at 6:30 p.m. in the park — and see which pets walk away with prizes. Lastly, come get spooked at the haunted house from 6 to 8 p.m. in the City Hall’s Game Room. Enter at the doors closest to the basketball court at Robin Sweeny Park. For more about the free events, go to sausalito.gov.

• See what creepy and creative costumes you’ll spot at Fairfax’s Halloween parade at 5 p.m. Tuesday. The route starts from the Fairfax Theater and goes down Broadway to Bolinas and over to the Haunted Grove in Bolinas Park. And afterwards, trick-or-treaters can head to Dominga and Napa avenues for more trick-or-treating fun in the neighborhood. The street will be closed to traffic all evening. For information about the Fairfax Chamber of Commerce’s free event, go to townoffairfax.org.