I’ve ridden a 16 footer two times (that I built) then sold it to Josue from Puerto Rico. I regulary ride my 12 footer (that I also built) in parades and stuff and do some tricks like juggle, idle one foot extended and crossed, backwards, spins and if I’m feeling lucky or sore, seat out in front/stomache on seat.
my 5 footer
A while back there was this thread about a website that showed a guy at Everest basecamp with a unicycle…That’s a bit over 17,000 feet.