Here is another picture of the slide at John Mt Summit Lake looking down hill
towards the Seward Highway MP 41. The Red line marks the debris edge at the
bottom. Very wide with some broken trees in the middle (hard to see). Very
broad fan of avalanche debris. Lots of blocks in it very powerful avalanche.
Taken from the point just below the start of debris field and below Adams picture looking up. Where the valley narrows looking down.