Douglas Tompkins, an outdoorsman, environmental activist, conservationist and entrepreneur who co-founded the North Face clothing company in San Francisco, died Tuesday in a kayaking accident in southern Chile.

Mr. Tompkins, who also co-founded Esprit with his then-wife, Susie Tompkins Buell, capsized while paddling with five other people on General Carrera Lake in the Patagonia region, according to reports confirmed by North Face officials. He was eventually pulled from the water, but died of hypothermia at Coyhaique Regional Hospital. He was 72.