The Impossible Route is a cycling documentary that covers the story of Jeremiah Bishop and The Vegan Cyclist as they ride bikes up the world's hardest cycling gravel climb. Mauna Kea is the world's largest volcano and has the objectively the hardest road climb up to the top. This cycling documentary looks at the gravel road up to the the top, which had never been done before. What makes this route so difficult is the combination of all factors. Distance, elevation gain, elevation peak, gradient, and road surface.
With a peak elevation of 14,000 ft, the oxygen is only 12% at the top. The first 2 miles avg at 20% gradient on the USA's steepest paved road. The road cycling climb up Mauna Kea is objectively the worlds hardest climb, but many have accomplished that challenge. The impossible route is almost entirely on gravel roads, making this cycling adventure, the hardest one day route in the world. Big Island Bike Tours was the biggest support on this cycling documentary as they were the sag and helped get some of the great footage you see.
Big Island Bike Tours took an entire week to help Jeremiah and myself realize this amazing adventure. If you are ever on the big island, look up Alex at Big Island Bike Tours and have him show you around.