As far as whitewater rafting and kayaking go, the Cahabón is pretty much as good as it gets in Guatemala. The river itself stretches about 196 km through Alta Verapaz before emptying into the Polochic, passing through remote jungles, caves, and underneath the unmistakable Semuc Champey land bridge. And the rapids? Well, depending on the time of year you tackle it (shoot for July - Jan) they range from a moderate class III up to higher-level class IVs (names like "Rock 'n Roll" and "Entonces") and the occasional class V. Needless to say, you'll be kept on your toes.
Single day trips are certainly doable on the Cahabón, however to do these you'll likely want to be stationed closer to the river in towns like Lanquin or El Estor. If you're trying to squeeze as much adventure as you can out of it, consider a 3 or 4 day journey down river that can be paired with caving and visits to Semuc Champey and/or the Quirigua Mayan ruins. Check our links for more details and, whatever your time constraints, give a visit to this fantastic Guatemalan waterway some serious consideration.