Originally Posted by Badger6

Wow! When I was in the States at the end of May, I rode a ~75km route in this area. I started from the Jake parking lot (south end of the loop). The route had some single track, some decent gravel roads, some washed out gravel roads, and a few places (all of it on the steepest sections) of big rocks comprising the road surface. I kept an average somewhere just north of 17km/h. If you have decent bike handling skills and your bike is fitted with 38s or bigger, there is no reason it cannot be done on a "gravel" bike. Fore reference, I was on my '21 Diverge with 38mm Pathfinder Pro tires, set up tubeless.