JOHN MUIR DAY — Join Sierra Club for 6-mile, moderately difficult hike and service project to Manana Falls on Saturday. Bring pruning saws, loppers or clippers. Contact Ed Mersino at 223-5765 or Arlene Buchholz at 988-9806.

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

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

MOKAUEA ISLAND PROJECT — Volunteers needed Saturday 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.

KALIHI NATURE PARK — Volunteers needed 8:30 a.m.-noon Saturday to help develop land-based health program for Kokua Kalihi Valley; weeding, gardening, removing invasive species and replanting native forests. Meet at 3659 Kalihi St.

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

WORM COMPOSTING — Learn basics of vermicomposting 8 a.m.-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.

KOKE'E INTERNS — May 15 is deadline to apply for summer internships with Koke'e Resource Conservation Program. Be at least 18; major in biology or conservation preferred. Housing and stipend provided. Visit www.krcp.org or e-mail rcp@aloha.net.

CONSERVATION CONFERENCE — Volunteers needed for 2008 Hawaii Conservation Conference July 29-31. Seeking coordinator and help with audiovisual, exhibits, film festival, registration, souvenir sales; orientation meeting on July 28. Contact Mariza Silva at 587-0061 or silvam@hawaii.edu.