From Saturday, June 11 through Monday, June 13, enthusiastic and fit volunteers are invited to a Crater Service Trip with Friends of Haleakala National Park. Volunteers will stay at the Kapalaoa Cabin. Volunteers will perform a number of tasks ranging from cabin maintenance to native planting to invasive species removal. Free. 8am. Haleakala National Park (Haleakala Hwy., Kula); 808-669-8385; Nps.gov/hale/index.htm

Photo courtesy Friends of Haleakala NP