@skyblond Same terrain? Usually it's about when you feel for things that you can smash it...
(was that the case in doing the 35Km?)
@skyblond Have to say something about some winter day works (maybe less sweat / keeps body cooler).
Also maybe as "Wim Hof" mental type of effect you keep going more mentally in cold...
Interesting to hear though... I often like some target (I used to visit my friends "to see if they were in" else say hi to their parents and job back!