I moved my boat from 257' above sea level in Virginia to 800' above sea level in South Carolina. Only a difference of +543 feet.
We used the same settings, suck gate, rope, board and everything else from the other lake including our two friends we usually go out with. Okay I have gained a few pounds but only a few. No problem with pulling up so no need to change prop.

I was the first to be pulled and my wife who has pulled MANY times was having difficulty getting the wave to form initially but not too bad. Once it did we had at least a 3' killer wall which was our highest ever. Plenty of push but only 1/2 to 3/4 length we had before. Okay I know how to fix that.
Does the altitude really change things that much or am I just imagining it?