Jumonville is a United Methodist camp and retreat center located in Fayette County, Pennsylvania, USA near the city of Uniontown, PA. Jumonville is famous for its 60-foot-tall cross that stands on top of Dunbar's Knob on Chestnut Ridge. Jumonville is named after Joseph Coulon de Villiers de Jumonville, who was killed during a skirmish with George Washington at the Battle of Jumonville Glen that set off the French and Indian War.