KALIHI NATURE PARK — Volunteers needed 8:30 a.m.-noon Saturday 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.

EARTH DAY BEACH CLEANUP — CITO (Cache In Trash Out) will host Kaloko Pond and Sandy Beach cleanup from 10 a.m.-12:30 p.m. Saturday. 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 semiannual Hawaiian Monk Seal Count 10 a.m.-1 p.m. Saturday on main islands. Contact Nicole Davis at 292-2372 or nicole.davis@noaa.gov.

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.

MOKAUEA ISLAND PROJECT — Volunteers needed Saturday to help Kai Makana and Mokauea Fishing Village Association create an 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.

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.

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