Join the Sonoran Desert Weedwackers to eradicate buffelgrass and fountain grass from 8 to 11 a.m., Saturday, Nov. 20; and Wednesday, Nov. 24. Work may require hiking and pulling grass on steep slopes. Ages 12 and older. RSVP is required. Call 615-7855, or e-mail firstname.lastname@example.org to RSVP or for more information.