In sum, it’s not that elite marathoners couldn’t become elite mountain ultramarathoners because ultramarathoners are so special, it’s that there is a multi year learning curve to do so, particularly with longer races in terms of learning new gear, stride patterns, terrain, nutrition, and overall race management techniques. Factoring all that in, it’s not so simple as taking an Uber from Iten to Steamboat and picking up your $15,000 check. Add in the fact that few races have appearance fees, and the economics aren’t as appealing as they seem at first.
That said, the fact that someone like Courtney Dauwalter, someone with no high level traditional running background, so thoroughly dominates long mountain ultras, hints that there is a unique skill set required to succeed at these events. It dovetails with traditional running, but the overlap is only partial.