There is a part where walls meet becoming a cave in the rainy season becomes a terrible torrent of wide sections siphon the expedition can rest or camp on the banks , the ideal for travel months are from January to May . The
second on the Chiapas Bridge 40 minutes from the capital city, where the boat is covered by the reservoir of the hydroelectric Netzahualcóyotl with a distance of about 2 hours to reach the camp The Boxed , where it will go upstream to part of La Venta river Canyon .