This weekend, come rain or shine, Alamedans and friends can participate in the 45th annual Sand Castle and Sand Sculpture Contest. The event begins at 9 a.m. on Saturday, June 4, and ends at 1:30 p.m.

Participants and observers should go to Robert Crown Memorial State Beach (on Shoreline) for the festivities. They should also bring shovels, buckets and plenty of imagination, organizers say.

This event is co-sponsored by the Bay View Women’s Club, East Bay Regional Park District and the Alameda Recreation & Park Department. Registration is free.

Viewing and judging will begin at 12:00 p.m. (noon) with awards presented at 1:00 p.m. Categories include: Sand Castle and Sand Sculpture, ages 12 and under, 13 and over and family.