About 13 hours on an aborted attempt on Washington, I simply was in terrible shape. My longest completed hike was The Tripyramids, that was about 10.5 hours. We went up Pine Bend Brook and down Sabbaday Brook, with most of the descent in the dark. I think we left the summit of South around 430pm, this was in October so sunset was maybe 630. Sabbaday was an awful trail, markings were pretty much nonexistent and the trail itself was very hard to follow in the dark. We finally got back to our vehicles around 930.