JOHN MUIR DAY — Join Sierra Club for 6-mile, moderately difficult hike and service project to Manana Falls tomorrow. 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 from 10 a.m. to 12:30 p.m. tomorrow. Register at 9 a.m. at Sandy Beach north bathroom. Bring gloves and old clothes; picnic to follow. Contact mike@islandrecreation.net.

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

MOKAUEA ISLAND PROJECT — Volunteers needed tomorrow 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.

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

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.

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.

KOKE'E INTERNS — May 15 is application deadline to apply for summer internships with Koke'e Resource Conservation Program. Must 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 to be held July 29-31. Seeking volunteer coordinator and help with audio-visual, exhibits, film festival, registration, souvenir sales; volunteer orientation meeting on July 28. Contact Mariza Silva at 587-0061 or silvam@hawaii.edu.

WEED & POT CLUB — Maui Nui Botanical Garden's Weed & Pot Club meets from 8:30 to 10:30 a.m. Wednesdays at 150 Kanaloa Ave. in Kahului to weed, rake, trim or transplant nursery plants, and perform other beautification and maintenance work. Tools, gloves and drinking water provided; bring sunscreen, wear shoes.

THURSDAY WORKDAYS — Join the Nature Conservancy from 8 a.m. to 4 p.m. Thursdays at the Honouliuli Preserve in Kunia for volunteer work trips requiring hiking and moderately strenuous activity removing invasive species, clearing trails, monitoring and repairing fences. Meet at Kunia base yard. Contact Lynette Williams at lynette_williams@tnc.org or call 621-2008.