McCune Run (French Creek tributary)  McCune Run is a long 3rd order tributary to French Creek in Venango County, Pennsylvania. McCune Run rises on the Powdermill Creek divide about 1.5 miles south of Deckard, Pennsylvania in Venango County. McCune Run then flows southerly through Venango County to meet French Creek about 2 miles northwest of Utica, Pennsylvania. McCune Run drains of area, receives about 43.7 in/year of precipitation, has a topographic wetness index of 409.28, and has an average water temperature of 8.25 °C. The watershed is 63% forested.