Quote Originally Posted by Togath View Post
is there a maximum distance/duration Genji can wall climb?
Yes, although in most cases the answer to "can I climb up this" is "yes." There are a few exceptions, but I can't recall exactly where at the moment. I believe the distance is about 6-7 meters though.

And is it ever possible to gain elevation using Lucio's wall ride?
Yes, but not on a single wall. If you jump to another wall and hit it higher than your current elevation, you'll ride the new wall at the higher elevation. If you find a corner where you can bounce between two walls, for example, you can reach the top of the objects in question.