South Mountain is generally considered the line where The Wilderness starts.
Every time some liberal “army” swears they’re coming out to the rural areas I instantly think “ they’ll never make it over South Mountain “.
Western Maryland is less about geography than a state of mind.
I love Western MD. I-68 is an underrated drive. Lovely views of the Appalachian Mountains. Usually jump on Rt40 at some point and enter PA that way. Western MD has a different vibe, that’s for sure.