There is a great website posted by RCN (Radio in Colombia) for the 50th Clasico RCN race throughout Colombia.
There are very good fotos and a downloadable Race Bible. Click on Descargue la Revista. The stage on Wednesday crosses La Linea, a 1400 meter climb in 20 kilometers in a 125 kilometer stage.
This is the best website yet for a Colombian race, and super for any race.