Mark World Water Day by joining a group of volunteers at Marine Park, S.E. Marine Park Way and Columbia Way, to pick up litter, rain or shine, 9:30 to 11:30 a.m. March 22. Litter pickers and buckets will be provided. Volunteer should expect to walk 1.5 miles on paved and uneven, muddy trails. Registration is required at cityofvancouver.us/publicworks/page/world-water-day-marine-park-beach-cleanup.