Wow, I haven't heard of this one before. I'm no couch potato these days, but that's the kind of feat that makes me realize I am far from fit, it seems insanely difficult to even navigate the trail.
But there's a difference between that and being at the very peak of human physical and mental endurance.
In many ways, it seems harder than climbing Mount Everest, due to the time limits.
Also they're not kidding about Everest's death zone - it's genuinely incompatible with human life up on that mountain, whereas while its no stroll in the park where this race is held, it's not going to just kill you if you stay there a bit longer - the strict timer is because many more people could complete the loops at a slower pace. Not me, but probably most serious entrants.
What? No that’s not right, of course they stick together or else no rookie would ever finish a loop.
> He would start with a swim in India's Bay of Bengal, walk over 700 miles across the Indo-Gangetic Plain, through the Himalayan foothills and climb every single one of Everest’s 29,029 feet. By starting at sea level, Tim added hundreds of miles and close to an extra 10,000 feet of elevation to the typical Everest expedition, which usually starts from Lukla at 9,383 feet.
https://www.rei.com/blog/climb/sea-level-to-everests-summit-...
But a massively impressive feat that's for sure!
So in that regard I kinda feel Mauna Kea has an upper hand still. But good suggestion, it is technically higher.