I missed this point before....
Come to the Rockies and learn all about runways and performance
Well, I never made it to the Rockies, but I have done a bit around the Sierras and the high desert.
And yes, performance is very different.
So what is the effect on braking distances, of operating to IAS at altitude, compared to near sea level operation?
Mind you, I can only judge from my experiences gained at an airport elevation of 6782' amsl, which is probably much lower than Slim Slag has flown from
But, I would say that stopping distances were significantly longer as the higher groundspeed has to be lost, whether rejecting a take off or on landing.
IMHO, mountain flying requires a modified approach to near sea level flying, for many reasons.