Subject: Orange spider
Location: West Chester, PA
October 23, 2013 6:48 am
I saw this orange spider in a park in West Chester, Pennsylvania on October 22, 2013. I took the picture.
Your spider is a harmless Orbweaver, most likely the Marbled Orbweaver, Araneus marmoreus, a species with highly variable coloration. Many individuals are orange, and the spiders mature in the fall, right around Halloween, so they are frequently called Pumpkin Spiders. See BugGuide for additional information on the Marbled Orbweaver.