Are you an experienced hiker and backpacker with a desire to help preserve native Hawaiian ecosystems?  You can be a National Park Service volunteer on the Friends of Haleakalā National Park strenuous 2-night service trip in Haleakalā Crater, Tuesday to Thursday, December 10 to 12. Participants will stay in the Palikū Patrol Cabin. The work may involve removing invasive species and native plant seed collection. Tools and safety equipment are supplied by the park. Park entrance is free. Participants contribute just $10 for food.

For details and how to sign up, visit www.fhnp.org. Then email the leader, andy@fhnp.org .