Just speaking to a friend in the tri club. Claus and his wife are 2 of the top ultra runners in Switzerland. A group of ultra run organisers and part time triathletes have created a new mad triathlon. 10 people did it last year as a test, and it met with overwhelming feedback, so in 2020 it will be run as a proper event on Friday 24 Juky
Basically the objective is to complete a triathlon over the same elevation as Everest. I know the mountain passes very well, Susten, Furkur and Grimsel are amazing. The run up Pilatus scares the life out of me, but it is another amazing mountain.
Claus said that the cost will be very low, but the finishers shirt, even though low quality and cheap, will be the most valuable shirt you own. Accommodation in the military barracks before the start is included so is accommodation at the top of pilatus, but you need to supply your own sleeping bag and mat.
I will be entering, would be great to see anyone else silly enough to give this a go as well