Congrats on a nice trip and awesome TR. Could you describe in little more details the approach section between UBSL and south face? It looks like you ascended the gully right next to Fishhook Arete?
Thanks,
A.
As the map in my post above shows (red line), you can go up the bottom of the valley, favoring the right side after the first quarter of a mile. When you get almost to the headwall, turn sharply right and gain 300' or so on fine scrambling terrain. That puts you above the headwall, and it is a simple matter to then traverse over to the Col.
I had to scratch my head, wondering where that boulder field is that Richard mentions. The only possibility is a ~100' section next to that pothole lake. Takes 2 - 3 minutes at most to cross. The first time I did it (Richard was along), we stayed close to the lake. Now I skirt the lake more, and it is a non-issue.
And, yes to your last question.
Finally, on Rick F's comment: I, too, like loop trips. In this case, I prefer going up the south face and down the east ridge. Almost no loose terrain on the ascent, and, on the descent to Upper Boy Scout Lake, the scree helps these old knees a lot.