space-time wrote:
I found out a guy at work is member of this 300 Degree club

https://en.wikipedia.org/wiki/300_Club

Participants in the Antarctic 300 Club wait for a day when the temperature drops to -100F (073C) for more than a few minutes, generally in the winter. They first warm up in a sauna heated to 200F (93C) for as long as 10 minutes. Then they run naked to the Geographic South Pole, circling it in the -100F weather. After this, they usually warm up in the sauna again, often with the aid of alcoholic beverages.

btfc wrote:
I was the caretaker of a hot springs in the mountains of Wyoming for several winters. The pool was drained every night after closing; it required me to be in the water through much of the process, and usually I was skinny dipping. I’d have to jump up, do some scrubbing, and then get back in the water to re-warm. At its peak, the water came out of the ground at around 117 to 118 degrees. There were some stretches when the air temp went as low as -48. For a few minutes, I could walk around without feeling the cold, but when that period ended, it ended quickly.