some rough sections of single track, fast double track and some busy tarmac. the trail sections are unmarked and untraveled for the most part so being able to read the trail and not look at your phone is really important here. no resupply aside from the small gas station just outside the train on the route. this is a mtb route I did it on a hardtail with 2.4 inch tires, some of the sections are technical and rocky. with the right handling skills it could be done on a gravel bike, if you like to under bike, but a hardtail is the way to go. you wont save that much time on the tarmac sections with a gravel bike, just saying! the route is pretty remote and good chances are you will not see anyone for most of the ride, so if youre not comfortable being way out there all alone bring a friend!! dont froget to pack your climging legs