Paul - we were in Bolivia in June of last year. This trek took place in the early part of the month.
We don't have great internet connection right now, so I'll have to look up our route next week. I can say that we hired a taxi to take us to one of the mountain villages below Illampu. We spent 1.5 days hiking up one valley to the pass, only to realize that the driver had taken us to a different village. Should we have continued, we would have been on the loop that goes around the whole range. Unfortunately, we did not have time for that. So, we backtracked and traversed around the mountain edge to continue hiking below the peaks. I'll post more info when I can. Enjoy Bolivia. How long are you there and what are you doing?
Addie - too true!
Scott - thanks for the comment. However, you CAN still travel and trek around these great destinations.