Before you stretch two vast sinks, terminal areas of the Humboldt and Carson River drainage systems. The marshy remnant of Lake Lahontan, between this area and the distant Humboldt Range, served as a life-sustaining wildlife resource for prehistoric people who lived along its shores. Generations occupied caves on the lower slopes of the range. Scientific archaeological excavation shows that Lovelock and Ocala caves served as homes to people from 2,000 B.C. to about 1840 A.D. What they left behind tells of a successful adaptation of their culture to a lakeside environment. Nearby Leonard Rock Shelter, with human occupancy dating from 5,000 B.C., is a National Historic Landmark.