Gimpilator is a good guy. I'm not sure what he means by "YDS 3.5". I have never heard of such a rating. It is possible that he inverted it and meant 5.3, but In Washington, some climbs rated old class 3 and 4 and technical. I'll ask him what he meant. Either way, I'd plan on using a rope. Some may have done it without one, but most people don't.Here is the quote from the report you asked about: "By Washington State standards, this was probably a YDS 3.5." And furthermore, "they had climbed both peaks without rope." http://www.summitpost.org/peakbagging-s ... ina/702506" onclick="window.open(this.href);return false;
He was definitely mistaken as to which summit was more difficult.Here's also where the info on the two summits was found: "From the notch, one could continue to follow fixed lines to the right and climb the highest summit which is nicknamed the "Chilean summit". The "Argentinean summit" could also be climbed, but as a secondary, lower point, it had no fixed lines and was rumored to be more difficult."
On Ojos, not much. The book covers the entire Andes. It is a great book, but doesn't have that much detail on each individual peak because of all the territory covered. Still, I have found the book to be extremely useful (I have climbed dozens of peaks in the Andes) and the information adequate.How much other info does that book have?
No, but almost no one just climbs just Ojos, unless they do it from the Argentine side. For most people, it is at least a two week (or more trip) to climb that high.Is it worth buying if I'm only going to do Ojos?
If you climb just Ojos you are going to be sitting around most of the time waiting to acclimatize. Most people climb other peaks in the region in order to acclimatize.
On Aconcagua, most people acclimatize on the approach and by hauling loads between camps. On Ojos there are only two camps (at least from the Chile side) and both are connected by a rough and dusty 4x4 road (though we walked from ~16,000 feet). Since you drive so much higher on the mountain, you don't acclimatize on the approach or by hauling load on other camps. You could do that, and walk from a lower elevation, but that doesn't seem pleasant doing it on a dusty 4wd road with almost no water available. Usually people acclimatize by climbing lower peaks in the area and then go for Ojos in a few days.
Out of curiosity, if you are doing "just Ojos", at least from the Chile side, how do you plan to acclimatize?
If you want to do the Argentine summit, I'd recommend looking into doing it from the Argentine side, especially if you want to climb just Ojos. That approach is longer, more scenic, the route is easier (but much longer), there is more water, and the climb less technical. If I ever went back to Ojos, I'd do it from there. It is unlikely that I would go back though. Other mountains in the Andes are far more scenic and pleasant. Although Chile is overall a very clean country, the huts and the area around them is very dirty as well.If it's true that the left summit is easier and only 1.7 feet shorter (according to summitpost.com) and that either is considered acceptable, I'd probably just do that to be safe.