Glade Run is a long first-order tributary to Dunkard Creek in Greene County.
Glade Run rises about 2.6 miles north of Mount Morris, Pennsylvania, and then flows southeasterly to join Dunkard Creek about 1.5 miles northeast of Mount Morris, Pennsylvania.
Glade Run drains of area, receives about 43.2 in/year of precipitation, and is about 86.5% forested.