Yeah, I agree with Steve on Langley.
Williamson via Shepherd's Pass and the West Face (easiest way) would be a days effort reserved for someone super familiar with the area or someone with loads of mountaineering experience and the stamina of a trained athlete.
Aggregate elevation gain for a dayhike of Williamson is 2900m (9500 ft) (taking into account the drop to Mahogany Flat and the Williamson Bowl).
It is 19 km (12 mi) from the TH to Shepherds Pass, a 3km (2 mi) cross country trek, just to the base of the W. Face. It is then 600m (2000 ft) vertical foot climb to the summit (Class 2/3).
Then the descent, it's all that in reverse with 100m gain to get back on trail and another 150m section of climb on trail.
George Creek is shorter, but steeper and one heck of a brush-buster. I've never done George Creek though, so I can't attest to the difficulty.
Last edited by Snacking Bear; 08/07/14 02:59 PM.