Short but sweet article here fro masters of linkbait Cycling Weekly

Many winners have fell running experience, and the current victory record holder, Rob Jebb with 11, is one of the world’s best mountain runners, but has also competed internationally in cyclocross.

The route has changed over the years, and is now longer, at 61 kilometres, with more road sections. The order of peaks has changed too, with Ingleborough, Whernside then Pen-y-ghent the current  sequence. One thing remains — it’s still a super-tough and very special race.

Source: Icons of cycling: Three Peaks Cyclocross – Cycling Weekly