Dan Harmon and Dale Weatherson … Are you crazy?
It’s super difficult to walk!
the GR20 is notorious as being one of the most scenic, yet most difficult hiking trails in Europe. The harsh, granite terrain rises steeply out of the Mediterranean on the French island of Corsica. In July, when the snow on the peaks has melted and the refuges are open, the route becomes home to thousands of walkers who traverse the island in about two weeks. They move from refuge to refuge, eating and sleeping in relative comfort before the next stage. One must therefore question why anyone would choose to attempt to complete this route, almost 200km in length with more elevation change than Mt Everest, by mountain bike in early May!
besthike.com 
It was fantastic fun, but very difficult. We are going back in Sept 15……..
Hey Dale, did you complete the route? I’m curious/interested in having a go myself!
Naomi