I know you were talking about a mountain or something, but "climb to <altitude>" does make one think about this exchange which would be in feet, not meters:
"climb to FL20 and the flying dinosaur thing will break" could work though
Since, annoyingly, international altitudes are done in increments of 1000 feet (ish, handwaving)
mepian · · focus · HN ↗
unsnap_biceps · · focus · HN ↗
"Quick! Climb to 300 meters above sea level and the trex will boil and we will be safe!"
bel8 · · focus · HN ↗
"Quick! Climb to about 1000 feet above sea level and the trex will boil and we will be safe!"
dmoy · · focus · HN ↗
"climb to FL20 and the flying dinosaur thing will break" could work though
Since, annoyingly, international altitudes are done in increments of 1000 feet (ish, handwaving)