HALEAKALA OVERNIGHTER — Service trip Nov. 17-19 to weed heterothica at the Crystal Cave washout area, with stay at Kapalaoa Cabin. Call 808-248-7660 for information and reservations.

MANANA TRAIL CLEARING — Service project at 8 a.m. Nov. 10. Meet at trailhead at end of Komo Mai Drive in Pearl City. Bring hiking boots, long pants, rain jacket, water, lunch, hat and sunscreen. RSVP to 286-4616 or oisc@hawaii.edu.

HAWAI'i NATURE CENTER WORKDAYS — Volunteer workdays 10 a.m.-2 p.m. Saturdays at 2131 Makiki Heights Drive; call 988-8995.

LYON ARBORETUM WORK PARTY — Volunteer work party at 8 a.m. on the first Saturday of each month. Meet in parking lot, prepared for rain and sun; closed-toe shoes, bug repellent, hat, gloves recommended.

PINE TREE PULLERS — Help remove invasive pines near Maui's Hosmer Grove, 9 a.m.-noon Sundays. Transportation provided at 7:30 a.m. from Harbor Shops, Ma'alaea, and 8:15 a.m. from Mayor Hannibal Tavares Community Center, Pukalani. Closed footwear required; bring water and lunch. Reserve space by calling 808-856-8341.

KOKUA HALEAKALA — Haleakala National Park needs volunteers for trail maintenance, visitor assistance, weed control, cultural demonstrations, library work and clerical help. Transportation from Makawao available. Apply at www.nps.gov/hale/supportyourpark/volunteer-opportunities.htm. Call 808-572-4487.