Complex sentence: Bogner, Jr. competed at the 1960 Winter Olympics in Squaw Valley and actually led the competition in the men's slalom after the first run only to not finish with a fall during the second run.
Split into simpler sentences: Bogner, Jr. competed at the 1960 Winter Olympics in Squaw Valley. He led the competition in the men's slalom after the first run, but fell during the second run.