This is just the first one this season. Generally there will be a few each year. Crater Lake Webcams:
https://www.nps.gov/crla/learn/photosmultimedia/webcams.htm
Theres still a lot of snow up there as you can see in the linked story. He may have been sliding on snow most or even all the way, and that might be why hes still alive. That, and the fact he apparently didnt make it all the way into the water.
The stupid is strong with this one.