Collier Mountain is a mountain in the Ridge and Valley region of the Appalachian Mountains, located in Allegany County, Maryland. The 1,457 feet (444 m) ridge is approximately 5 miles (8.0 km) southeast of Cumberland. It runs 6 miles (9.7 km) northeast from the North Branch Potomac River near its confluence with Patterson Creek to Murley Branch south of Breakneck Hill.

(N. 39°37' W. 78°41')

• United States Geological Survey
• Maryland Geological survey

39°37′10″N 78°40′56″W / 39.61944°N 78.68222°W / 39.61944; -78.68222