Excellent - Ride a boat along the Grijalva River, see the immensity of the rock walls and fauna and flora of the region, ending with a delicious meal and shopping for handicrafts.

Great experience! - Brilliant tour through the canyon where we saw monkeys crocodiles armadillos and iguanas. We also enjoyed a wonderfull local festival in the village where we stopped ar the end of the trip.

incredible, well-planned and well worth it day in chiapas - excellent day! even though i booked very last minute, they picked me up very timely, we saw 2 miradores and did the boat cruise and got to see chiapa de corzo for 1.5 hours which i LOVED. this was an incredible value and i have seen a lot of mexico, yet this day was surely a memorable one

The Sump Canyon - Totally recommended, it is an incredible place, you start with the viewpoint to appreciate the canyon from the top, then you go down for the boat ride and end by disembarking in the town of Chiapa de Corso.

Great place very beautiful - It was very nice we had a great time. Beautiful views everywhere. Everyone treated us well. We will definitely be visiting again.

Canyon is a must see! No english tour though! - The tour overall was 'okay'. The sightings were absolutely stunning! The boat tour on the water through the canyon was incredible, that is something you have to see! We even saw multipe crocodiles. The tour operator itself was okay, otherwise it would have been a 5 star review. The driver/guide only spoke Spanish, as well as the boat driver. I think it's okay because we're in a Spanish speaking country after all. But would have been nice to learn a bit more about what we saw.

Enjoy and take care of the sump canyon. - Great natural beauty that would be very good to know but at the same time take care because there is garbage in the river and it is sad to see how we are not aware of the ecological damage.

Beautiful canyon, rest of the tour is a waste of time - Tour starts at pick-up around 9:00 and finishes around 18:00. First you visit 2 viewpoints, keep in mind these are on a completely different route from the boat trip, so it takes around 3,5 hours of driving and 45 min of stopping to see the view. View is beautiful, but you’re there around 11:30, so the sun is high and colors are blend. You arrive at 13:30 at the boat, which takes you on beautiful journey through the canyon. The canyon is spectacular, but note that ALL tours are completely in Spanish, doesn’t matter which tour operator you choose. There are crocodiles and spider monkeys which was awesome. At around 15:15 you arrive at the town of Chiapa de Corzo, of which the only purpose is making money of tourists. It’s not fun, not beautiful, no good food, nothing. And a complete waste of time as they make you spend 75 min there. It’s an incredibly long day for what you get and actually want to see. Unfortunately the only way to see the canyon if you don’t have your own car, is through these tours and all tours are the same.

Canyon gorgeous and wildlife is visible - We booked in advance through Trip Advisor/Viator. We visited the agency shop front upon arrival into San Cris, as we had read another review that the driver required a physical ticket on the day. However we were advised, no physical ticket required. This is a Spanish only tour, this includes the boat ride. The canyon was gorgeous and we saw lots of birdlife and crocodiles. Due to a road block, the driver took an alternative longer route to the canyon boat dock which then meant that we didn’t have time to visit the canyon viewpoints (micadores). Extra time was given to explore town Chiapa de Corzo. We would have preferred to see the canyon viewpoints. Not much to do in Chiapa de Corzo. We headed to the river and had a cold beer under a shady tree. On the return, the morning road block turned out to be protesters and they had extended their activities to cut off the alternative route. We had to wait for hours for police to bring under control and for the road to be cleared of debris that the protesters had placed. We had a nice time in the canyon. The full day tour is a bit of a drag from San Cris.

Beautiful area - Beautiful nature reserve Excellent plan: first go up for the view and then take a boat trip through the canyon. Visit Chiapa de Corzo was ok, because the guide only spoke Spanish, it was hard to find out from other travelers where we would be picked up. The driver had a very Mexican driving style