Yes, water boils at a lower temperature at altitude; may need to adjust by a few °F. 
Meanwhile it was 13°C here in the middle of the day. I had two appointments a few hours apart & had wanted to continue my tempo/SS progression to 7×11' at 88%, but I realised I was going to run out of time, so it was Ol Faithful Warlow on the switchbacks. Last week I felt cooked on the 4th interval, but I finished the 5th today not feeling worked but not cooked. But also I am pretty fresh today. Hill repeats when it's double figures on the celcius scale definitely means summer kit.
Workout profile was a bit rougher than I’d prefer, but got the job done.
Never really sure where to put these… this thread or the What workout did you do today? thread.
Moving in a few weeks. I’ve been spoilt, living on this hill. Hope I can find a hill with at least 160m of consistent altitude gain, or an uninterrupted 6km or longer stretch of road, so I can continue this sort of work outside. Or play with diving weights. Proper sandbagging. 