Pamela, Plum Creek Twp. is in Armstrong Co. but it does border Indiana Co. There is no town in PA named Glen Run up until 1900. Since you mention Smicksburg & Glen Run, I suspect you mean Glade Run which is near Smicksburg. Smicksburg is in Indiana Co. and borders on Wayne Twp. Armstrong Co. Glade Run is the name of the Presbyterian Church at the edge of the boro of Dayton, Wayne Twp. Armstrong Co. People have been known to call that area Glade Run. Its quite near the present day Dayton Fair Grounds. Connie M.