
Hasn't voted | Hi Fabien,
I think you would be wise to do the climb in October or November as the penitents were pretty obnoxious by late December. The only thing I would be concerned about earlier in the season would be soft snow or slab avalanches. I have never climbed in Argentina in the early season so I can’t comment on rock fall. The route is a shooting gallery by late season and I would recommend climbing the entire gully at night regardless of the time of year.
As to the difficulty, I was surprised at how easy the climb ended up being. It looks a lot more difficult from the ground. Given the penitents, it is a little difficult to estimate the angle but I would guess that it doesn’t exceed 45 degrees at its steepest point. I graded it AD not for the snow, but for the little bit of mixed climbing that was required getting out of the top of the gully.
We did bring a rope (visible in one of the photos), but it was only with us to guard against crevasses. If you already had scoped the decent route, you could probably solo the route in a few hours from base camp.
By the way, there are some nice looking routes on the south east face of Vallecito. Those routes look a little steeper than Supercanaleta and may make an amusing side trip by themselves.
Good luck!
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