Police would not release the victim's name or any information about the incident.
Lancaster County Coroner Dr. Stephen Diamantoni said the 60-year-old man died of traumatic head injuries and was pronounced dead at the scene.
Gower said 4,100 riders participated in Sunday's 63-mile ride. Now in its 31st year, the ride winds through some of the county's rural areas and passes through six covered bridges.
Information from: Intelligencer Journal, http://www.lancasteronline.com/pages/paper/sundaynews/