The Napo is one of the Amazon's major tributaries and the main artery connecting Tena to the deeper jungle. From Tena you can take a canoe east to the village of Misahuallí, a pleasant half-day on a wide, powerful river. Misahuallí itself is a small town with a monkey-filled central square and connections to jungle lodges further downriver. The Napo is also floatable by raft — a calmer, more scenic option than the Jatunyacu for those who want river time without adrenaline.
Downstream from Misahuallí, the Napo continues to the oil town of Coca (Puerto Francisco de Orellana), from where river transport continues deeper into Amazonian Ecuador and eventually into Peru. For most visitors, the stretch between Tena and Misahuallí is the practical limit, but the sense of the river as a highway into a genuinely remote interior is part of what makes it compelling.