Nice one. Nice to hear that it's easy for you to get into Ketosis. And yes, it makes "hunger" management so easy :). I barely noticed it for 1 hour of my fast but once that went I'd be able to do much longer.

And that's an interesting appraoch to IF. Do you have any particular reason behind the time intervals?
Yea man, 20 miles a day is a lot :). (Timewise). People do that when they do stuff like El Camino or the Apalachian Trail in US (I'm guessing you're from US).