Climbing Chiapas and Guatemala August 12-21

I'll be in Chiapas and Guatemala in August and may look for a couple days of climbing. Can anyone give information about climbing in Chiapas and Western Guatemala? What areas are good, places to meet climbers, things to avoid, etc etc? Thanks!

In Chiapas for sure you need to go to San Cristobal de las Casas, and contact Martin Siller, he open all the routes there, great person and climber.
In Guatemala, you can go to Lake Amatitlan and stay in "Belay Partner Hostal" they have the crag right there. Also in Antigua there is a nice indoor gym "Qubo Antigua". Hope it helps. 

Big limestone in Sumidero Canyon, outside of Tuxtla. 

Thanks Hernan and George. Good tips!