JOHN MUIR DAY — Join Sierra Club for a six-mile, moderately difficult hike and service project to Manana Falls on April 19. Bring pruning saws, loppers or clippers. Contact Ed Mersino at 223-5765 or Arlene Buchholz at 988-9806.

WORM COMPOSTING — Learn the basics of vermicomposting from 8 a.m. to 2 p.m. April 26 at Mylene's Floral, 94-1181 Ka Uka Blvd., Waipi'o; $20 fee includes minibin, starter colony and manual. Call 382-0432 or e-mail waikikiworm@hawaii.rr.com.

EARTH DAY BEACH CLEANUP — CITO (Cache In Trash Out) will host Kaloko Pond and Sandy Beach cleanup from 10 a.m. to 12:30 p.m. April 19. Register at 9 a.m. at Sandy Beach north bathroom. Bring gloves and old clothes; picnic to follow. Contact mike@islandrecreation.net.

KULA FOREST RECOVERY — The state Division of Forestry and Wildlife seeks volunteers to help replant burned areas in the Kula Forest Reserve on Maui; call 808-873-3980. To help maintain trails, call Na Ala Hele at 808-873-3509.

MONK SEAL COUNT — Join NOAA Fisheries for semiannual Hawaiian Monk Seal Count from 10 a.m. to 1 p.m. April 19 on main islands. Contact Nicole Davis at 292-2372 or nicole.davis@noaa.gov.

MOKAUEA ISLAND PROJECT — Volunteers needed April 19 to help Kai Makana and Mokauea Fishing Village Association create educational center. Transportation to island by outrigger canoe; bring old shoes, hat, sunscreen, water, shorts and T-shirt. E-mail kaimakana@gmail.com to confirm date and receive waiver and directions to project.