McKinney Run is a long tributary to Brokenstraw Creek that is classed as a 1st order stream on the EPA waters geoviewer site.
McKinney Run rises in Warren County, Pennsylvania about 2 miles northwest of Irvine and flows south to meet Brokenstraw Creek at Irvine.
McKinney Run drains of the Pennsylvania High Plateau. The watershed receives an average of 44.5 in/year of precipitation and has a wetness index of 335.39. The watershed is about 87% forested.