Complex sentence: The race is a 7.6 mile climb which has an average gradiant of 12% and reaches gradiants of up to 22%, this is more difficult than even the toughest climbs of the Tour de France.
Split into simpler sentences: The race is a 7.6 mile climb which has an average gradiant of 12% and reaches gradiants of up to 22%. This is more difficult than even the toughest climbs of the Tour de France.