An ancient Pleistocene site in Oregon dated to over 13,000 BP and associated sites with a long sequence of occupation in the same lake basin. Deposits of pumice from an eruption of nearby Mount Mazama in c 5000 bc provided excellent chronological control for these sites. Associated artifacts, including a mano and metate, projectile points, and other stone artifacts indicate an early hunting and gathering subsistence pattern for this period. Later contexts contain artifacts of the Desert Tradition. Occupation continued into historic times, but looting has caused the archaeological record to be unreliable after c 1000 BC.