The only "traverse" that I know of on the SF "OB" is up high on P4 of the SW Face. Pretty straight forward yet delicate. As I remember, protects rather well w/slung CH's. It's a solid Salathe/Wilson "Old Skool" '48 .6ish. I recall Lenny Reeves sharing with me how that traverse was a mind ringer and to not be taken lightly. She was absolutely right!
Another example that what we are doing as climbers can indeed have som very sad consequences. Appears that this was her first real BC climb as well.
Be careful out there folks. Climb within or below your abilities when in the backcountry. Remember that "Old Skool" BC ratings are far more committing and in most cases, more difficult than modern day ratings at the same level.