The slopes of a cooled volcano, Mount Konocti, reflect in the waters of Clear Lake, the oldest lake in North America. Home to Pomo Indians for millennia, the region's first immigrants settled near Kelseyville. Mendocino and Napa Counties vied for ownership of Clear Lake, but disputes ended when a new county formed in 1861. The serene, natural landscape, plentiful mineral hot springs, and remote location attracted thousands of visitors to large resorts like Bartlett, Harbin, and Seigler Springs. Prizefighters came from all over the nation, including Gentleman Jim Corbett and John L. Sullivan, who trained at separate local resorts for their 1892 title bout. Tourists and residents traveled in style on the steamer, City of Lakeport. Lake County towns like Lakeport, Lower Lake, Kelseyville, Upper Lake, and Middletown based their economy on agriculture and orchard crops as well as tourism and recreation, but this ancient lake remained and remains at the heart of all.