Río Piaxtla: A First Descent through the Deepest Canyon in North America. American Whitewater JulAug 2011; pp. 45-47; by Rocky Contos.
To see slideshows of the Piaxtla, click below:
Piaxtla1 (2009) Darin McQuoid's report and photos
Piaxtla2_(2009) Jesse Coombs report and photos
Piaxtla3_(2009) Hotel Charley 5: First Descent teaser
Piaxtla2000 (Main+Lower)