A friend Dan and I climbed Mt. Constance last weekend by a combination of routes. We approached from the S fork of tunnel creek. We had bluebird skies on Sunday and a full moon on Saturday night. Some of the traversing sections were scary on the way down. They were covered in slushy snow that had melted out quickly when the sun hit it. We climbed a one pitch variation of the finger traverse on the way back. It was around 60-75 feet of 5.7 on decent rock, no protection though, but that didn't matter as we didn't have a rope anyway. Dan dropped his axe descending from the summit block. Luckily it landed on a ledge 25 feet down and he was able to downclimb and get it and then crawl through a tunnel to a downward sloping ledge from which he was able to regain the ridge crest. It didn't look too fun.
This is a long approach. You have to gain and loose close to 2000 feet before you actually get to the mountain not including the trail to tunnel creek shelter.
Does anyone have any information on the North fork approach? It looks like it may be easier especially in early season or winter.