ALA WAI CLEANUP — Join Sierra Club for Ala Wai Boat Harbor cleanup April 5. Meet at 8 a.m. at harbormaster's office. Bring sturdy closed-toe shoes, hat, thick rubber gloves, sunscreen, water. Call Deborah Blair at 955-4168.

MONK SEAL COUNT — Join NOAA Fisheries for semi-annual Hawaiian Monk Seal Count from 10 a.m. to 1 p.m. April 19 on main islands. Contact Nicole Davis at 292-2372 or nicole.davis@noaa.gov.

KANE'OHE WETLANDS PROJECT — Volunteers needed April 12 for Sierra Club wetlands service trip on Marine Corps Base Hawai'i. Submit name and contact information by April 10 to Annette Kaohelaulii at 235-5431.

CRATER OVERNIGHTER — The Friends of Haleakala National Park will conduct cabin maintenance, invasive species removal or other work April 12-14 at Kapalaoa Cabin. Before signing up, create an account at www.fhnp.org. For reservations, call Farley at 808-248-7660 or Matt at 808-876-1673.