2013 Vuelta a España, Stage 12 to Stage 21

The 2013 Vuelta a España began on 24 August, and stage 12 occurs on 5 September. The second half of the race takes in most of the mountain stages, with 5 occurring in the last 9 days. This part of the race is where the winner should be confirmed, with large time gaps expected to appear during the mountain stages.

...
Wikipedia