Mt. Russell 

There is an alternate approach via the "Cartwell Variation" which continues past Upper Boyscout Lake. The was originally used to approach the East Ridge. Continue on a use trail past the right of Upper Boyscout. Keep going past an alpine lake, again passing on the right, and around a scree slope until you meet a slabby buttress. You can climb the slabby buttress at Class 3+ or continue on the faint tail. In either case you eventually work your way high under the south face of Russell heading for the "L Shaped Pass".

It is shorter than the Iceberg approach but the scree below the south face is truly heinous. 3/4 of the way through it I swore never to do it again (similar oaths have been uttered on the Whitney-Russell Col). In truth, both ways are kinda brutal.

Where I think this variation truly shines is getting down to Upper Boyscout in the event the East Ridge isn't an option. This happened to a partner and I due to a heavy dusting of snow on the upper reaches. East Ridge was a death trap, so we went back via Iceberg. This would have been a much better way down.