Castro Valley – Earth Day Festival

The Castro Valley Library invites families to a lively Earth Day celebration. 

Families and community members enjoy seed giveaways, seedling exchanges, and a gleaned fruit sharing table while learning simple ways to support local ecosystems. The event also includes children’s crafts, native plant activities, and a nature scavenger hunt at nearby Sage Park. 

Date: Saturday, April 4, 2026 

Time: 11AM - 2PM 

Cost: Free 

Location: Castro Valley Library, 3600 Norbridge Ave., Castro Valley 

Link: Click here for more information.