I'd not seen this site before, might be useful
http://deptweb.wwu.edu/huxley/huxweb/gis/EGEO452/09_projects/Mtbakeravalanche/index.htm
Hey, that's pretty cool. It's interesting that at least one of the pictures has an obvious recent slide outside of the marked paths. I need to look more closely into what the study actually says. Very interesting.