Complex sentence: Bontrager has competed in many mountain bike races, including 24-hour races such as the Three Peaks Cyclo-Cross event in England, as well as stage races such as the Trans-Sylvania Mountain Bike Epic in State College, PA.
Split into simpler sentences: Bontrager has competed in many mountain bike races, including 24-hour races. He has also competed in the Three Peaks Cyclo-Cross event in England, as well as stage races such as the Trans-Sylvania Mountain Bike Epic in State College, PA.