OPERATION POLIHALE — The Division of State Parks and Leadership Kaua'i welcome volunteers to work with Pi'ina Hoku youth program in Operation Polihale 8 a.m.-noon Saturday and April 12. Work includes cleanup, plant trimming, fixture repairs, painting, replacement of vehicle barriers at Polihale State Park. Contact Leadership Kaua'i at 808-246-8727.

PALOLO SERVICE PROJECT — O'ahu Invasive Species Committee and Sierra Club will do weed control at Mau'umae Trail from 8 a.m.-2:30 p.m. Saturday. Meet at Church of the Crossroads parking lot. Trip involves 45-minute hike and some off-trail weeding in steep terrain. Bring water, snacks, lunch, rain gear, sunscreen, bug repellent and sturdy walking shoes. RSVP to 286-4616 or oisc@hawaii.edu.

MARSH RESTORATION — The Hawai'i Nature Center is restoring Pouhala Marsh, the largest remaining wetland in Pearl Harbor. Volunteers needed to pull pickleweed and mangrove 8:30-11:30 a.m. Saturday. 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.

SANDY BEACH CLEANUP — Join the Sierra Club 8-10:30 a.m. Sunday 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.

KALIHI NATURE PARK — Volunteers needed 8:30 a.m.-noon March 15 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.; monthly community volunteer access days held every third Saturday.

CRATER OVERNIGHTER — The Friends of Haleakala National Park will conduct cabin maintenance, invasive species removal or other work during March 15-17 service trip to Holua Cabin. Before signing up, go to www.fhnp.org, create an account, log in to the account to learn more and certify your readiness for service trips. For reservations, call Farley at 808-248-7660 or Matt at 808-876-1673.

WEED & POT CLUB — Maui Nui Botanical Garden's Weed & Pot Club meets 8:30-10:30 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 8 a.m.-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.