Round Top (10,381 ft.) is a craggy
mountain of volcanic origin. It is a relic from the time
that began about thirty million years, when volcanoes erupted
in this area—in what is now the
Mokelumne Widerness within the
Eldorado National Forest.
Round Top is surrounded by many other Central Sierran features of geological interest as well as by scenic lakes including its namesake Round Top Lake, Winnemucca Lake and Woods Lake. This is a popular summer hiking area, just south of the Carson Pass on Highway 88. The Pacific Crest Trail (PCT) passes by to the east of the Round Top massif. The hiking trail that branches off the PCT near Frog Lake and continues on to Winnemucca Lake, Round Top Lake and Fourth of July Lake offers various views of the peak and fractures of the Round Top mountain area.