So, hardly scientific, but I grabbed a possible 6' person off the bridge on the left and added 2/3 of their height to them for 10' and then piled them up, keeping them on the same ground plane. The plane is way forward of the center of the volcano which gives me an inaccurate number unless I assume they are 75'-100' away from center. Way forward, I came up with roughly 150'. This means the volcano is taller than that.
Guessing such an angle of height that would create is sorta messy but I believe it would still be under or close to 200'.
I hope a few of you can follow my logic here.
Oh, and the guy I circled in the wave pool looked like the Pope in full garb to me... had to point that out.