San Mateo Bio-Blitz
Saturday’s event brings scientists and volunteer citizen-scientists together in a one-day study of biodiversity. Bring your smartphone, camera and binoculars. The event is 8 a.m. to 6 p.m. at Laurelwood Park and Sugarloaf Mountain, 3471 Glendora Drive, San Mateo. Free.
Redwood City PortFest
The PortFest features interactive on-the-water activities, tours, live music, exhibits, food vendors and kids’ activities. It takes place 8 a.m. to 5 p.m. Saturday at 875 Seaport Blvd., Port of Redwood City, Redwood City. Free.
Poetry Day at the Rendez Vouz Cafe. The event takes place 1 p.m. to 3 p.m. Sunday at 106 S. El Camino Real, San Mateo.
Blessing of the animals
The 10th Anniversary Blessing of the Animals is 2 p.m. Sunday at Burlingame United Methodist Church, 1443 Howard Ave., Burlingame. Free.