In reply to THE.WALRUS:
> Has anyone on UKC climbed it?
Yes, but not me... Damo might come along and give some good advice...
I did wander up Parinacota a couple of years ago, it's right next to it, a bit lower and a bit easier.
>
> I'd be interested what sort of acclimitisation programme you used - are there any smaller peaks or a decent trek nearby?
Well, there's Parinacota. I climbed some peaks in the Cordillera Real before heading west, which I'd recommend. There are other lower peaks out near Sajama although it is quite a bleak place, the Cordillera Real is a bit more Alpine-like.
> And what the best way to get there from La Paz.
Go to the bus station and find the bus to Arica. I found several buses heading to Arica, and when I asked at the desks if I could get off early some said no, but one company said yes so I took that bus.
In La Paz I was given the phone number of a bloke who lives out there, I can't remember his name or the name of the village off hand but it worked perfectly. I got off the bus right where he lived, he had rooms to let and a 4x4 that he used as a taxi. If you like I could have a look and see if I still have his details.