1988 Map of Little Glass Mountain

About this map

Little Glass Mountain dominates this volcanic landscape where the boundaries of the Klamath National Forest, Modoc National Forest, and Shasta National Forest converge. This 1980s-era survey reveals an environment shaped by relatively recent geomorphic activity, notably the Crater Glass Flow and a series of prominent craters including Paint Pot Crater, Shastine Crater, and Giant Crater. The industrial character of the region is evident through the widespread extraction of volcanic materials, marked by the Pumice Mines near Pumice Stone Mountain and several Cinder Pit locations. Water resources are scarce in this porous terrain, limited to remote installations like Bray Well and Pumice Stone Well. High points such as Little Mt Hoffman and Red Cap Mountain provide vantage points over the Grasshopper Flat and the complex obsidian and pumice deposits that define this portion of Siskiyou County.