I came across this link on TGR and found it pretty interesting. If their numbers really are "true," then a lot of ski areas are seriously inflating their vertical.
We discussed this a bit in the Resorts forum: http://www.epicski.com/forum/thread/96998/actual-skiable-vertical-resource
They claim 505 but the last time I skied there I wore an altimeter watch and I measured 525 averaged over 30+ runs...
The poma lift and glade are no longer there and a chairlift now serves the main run. Perhaps the lift's elevation added the extra 20 feet. :)
Yeah and I wore a NEW altimeter watch all the time at Camelback mountain (800 feet) and it kept telling me the vert was 1000. I sent it for repair and battery change (Avocet), it still registered that. The old Avocet was always dead on. Now you can't tell me the mountain UNDERREPORTED their vertical....
Now I have a Brunton. I ski for EIGHT DAYS comparing the chairlifts I ride with the vertical recorded. It measures ascents and descents separately. THEY ARE NEVER EQUAL. I also replace the battery if over the eight days the cumulative amount of each is more than 5%. ANY INDIVIDUAL DAY COULD BE OFF FAR MORE THAN THAT, depending on the weather.
So, one day? I wouldn't rely on that. And I've been using altimeters of various kinds since 1989.