A sign telling hikers to stay on the trail in Haleakala crater. Hiking off-trail leads to significant soil erosion in the delicate volcanic soils, Maui, Hawaii, United States of America

nobody day outdoors horizontal close up part of front view danger geology barren mist usa text warning warning sign physical geography hawaii western script focus on foreground arrow non urban scene maui volcanic crater haleakala crater foot trail sign post cautiousness