The highest I've ever jumped was way back in the day when I still rode Junior. We jumping 3ft a few times. Haha not THAT big. But I'm with a new trainer now, and on a monster horse who has incredible potential, so hopefully that will get higher soon (:
Highest I ever jumped was 2'8 . . . I think, yeah pretty sure . . . Either 2'8 or 2'6 (It was a while ago) on a school pony. My horse broke his leg when he was little and he can't jump very high (I don't like to jump him at all really). But I LOVE jumping and I miss it SO much! But I wouldn't trade him for the world <3
My old Gelding was an amazing jumper - I schooled him 5' and we competed in Level 4 Jumpers (3'9 - 4').
My Mare had a comfort height at 3'6 but we had done 3'9.
My little guy.. well, we've jumped 2'6 so far but he LOVES jumping. He's only 4, we'll see someday what he can do :)