Seven Third Summits Sumantri () and Ngga Pulu (). The definition of "continent" is a matter of some dispute among mountaineers seeking to complete this challenge. The main ridge of the Greater Caucasus range is generally considered to form the boundary between Europe and Asia. In that case, Mount Elbrus () and Dykh-Tau (), are the two highest mountains in Europe. Excluding the Caucasus Mountains, Mont Blanc () and Monte Rosa () would be Europe's two highest mountains. The Australian continent is defined as comprising the mainland of Australia and proximate islands on the same continental shelf, including Tasmania and New Guinea. In
Snow Mountain East Snow Mountain East Snow Mountain is a mountain in Northern California in the Snow Mountain Wilderness of Mendocino National Forest. The highest point on the mountain, known as Snow Mountain East, is the highest point in both Colusa and Lake counties. Snow Mountain West, a subsidiary peak also near the county line, is to the southwest at an elevation of . On clear days, the peak should be seen from Mount Diablo, and from several peaks, including Mount Saint Helena and Mount Konocti, in the Mayacamas Mountains. The peaks are visible from Arbuckle on Interstate 5 in California's Central Valley.