The mangroves along Kosrae's western shore are among the most extensive in Micronesia, and paddling through them is one of the island's most distinctive experiences. Where the channels run inland, the canopy closes overhead — prop roots descend on all sides, the light turns green, and the sound of the ocean disappears. At high tide it is possible to paddle deep into the mangrove interior by sea kayak or traditional outrigger canoe; at low tide the channels become too shallow. The timing of trips is governed by the tides rather than by the clock.
Local tour operators offer guided kayak trips that incorporate the mangroves and adjacent marine reserve, usually lasting 2–3 hours. The guide's knowledge of which channels are navigable and what species you are looking at is invaluable — the mangrove ecosystem is complex and not immediately legible to the uninitiated eye. The Yela Ka Forest, a conservation area of endemic ka trees (Terminalia carolinensis) in the island's interior behind the western mangroves, can sometimes be combined with a mangrove tour as a day excursion.