PALOLO SERVICE PROJECT — Weed control along Mau'umae Trail, 8 a.m.-2:30 p.m. March 8; involves 45-minute hike and some off-trail weeding in steep terrain. Meet at Church of the Crossroads parking lot. Bring water, snacks, lunch, raingear, sunscreen, bug repellent, and sturdy walking shoes. RSVP to 286-4616 or oisc@hawaii.edu.

SANDY BEACH CLEANUP — Join the Sierra Club, 8-10:30 a.m. March 9, for cleanup of highway and coastal areas. Bring closed-toe shoes, water, hat and sunscreen; bags, gloves provided. Participants under 18 must have signed waiver. Meet at the east restroom at Sandy Beach Park. Call 394-2898.

POUHALA MARSH — Pull pickleweed and mangrove in Pearl Harbor marsh, 8:30-11:30 a.m. March 8. Bring work gloves, water, hat, sunscreen, towel and change of clothes; covered footwear and long pants required. Contact Pauline Kawamata at 955-0100, ext. 18.

WAIPAHU EARTH DAY — Aloha 'Aina Recycling Community Cleanup Project will accept bulky items and recyclables, 8 a.m.-2 p.m. March 1 at Waipahu Intermediate. Accepting HI-5¢ containers, printer cartridges, usable lumber, clothing, scrap metal, auto parts, cooking oil, lawn mowers, newspapers, cardboard, fishing nets and more. Volunteers, vans and pickup trucks needed. For curbside pickup in Waipahu area, call Clarence Nishihara at 728-1008 or Rene Mansho at 306-1876.

OPERATION POLIHALE — Volunteers welcome to work with Pi'ina Hoku youth program, 8 a.m.-noon March 8 and April 12, doing cleanup, plant trimming, repairs, painting at Polihale State Park. Contact Leadership Kaua'i at 808-246-8727.

CRATER OVERNIGHTER — The Friends of Haleakala National Park will do cabin maintenance, invasive species removal or other work during March 15-17 service trip to Holua Cabin. Before signing up, create an account at www.fhnp.org to certify your readiness for service trips. For reservations, call Farley at 248-7660 or Matt at 876-1673.

KALIHI NATURE PARK — Volunteers needed 8:30 a.m.-noon March 15 to help in a land-based health program for Kokua Kalihi Valley; work includes weeding, gardening, removing invasive species and replanting native forests. Meet at 3659 Kalihi St.; community volunteer access days held third Saturday of each month.