High Quality Content by WIKIPEDIA articles! Aspen Mountain is a long mountain located approximately 12 miles (19 km) south of Rock Springs, Wyoming and 5.5 miles (8.9 km) south of Arrowhead Springs, in Sweetwater County. The mountain gets its name from patches of Quaking Aspen trees located on the north and southern faces of the mountain. Various older topographical maps name the mountain "Quaking Aspen Mountain". Its primary use is for radio communications and it houses towers for various local and state companies.