Did a daytour and by the time we got to Mt Yasur, I already had a few beers. When I saw the huge ash/sand hill, I could not resist and aimed barefoot for the top. It's about 330m ascent on 700m so do the maths. Pretty brutal, in the heat, humidity, soft sand/ash and smelly volcanic gases.
Blitzed the downhill in under 2:30 - so much fun. Later I found out that someone has made Strava segments there lol. Took out the downhill, 2nd on the uphill. Technically, I did take that one out as well but Strava app dodged me there.
https://www.strava.com/activities/1333958054