Here is a first stab at a simple, annotated profile from the LiDAR data. It is a very slightly smoothed curve. I used a 50 point weighted average to get the smoothest profile that clearly mimicked the more data-rich version.
Have not yet gotten to extracting the lava flow profiles, but have added their longitudinal extents. Also added the main landslide complexes and some key sites to enable yeehow orientation. Overall the profile is pretty good. The only aberrant points show up where I tried to 'drive around' some of the no-data points and ended up treading on a terrace, so to speak. Next example will be the longitudinal changes in local gradient.