"Take a Boat Ride down the Negril River Take one evening to skip the usual beach sunset. Instead, hop on a guided glass-bottom boat and ride down the Negril River. You'll start where the river meets the sea on the edge of Seven Mile beach, and cruise down its banks. Take in the gorgeous scenery of mangroves and birds flying against a yellow sky. The ride lasts about an hour and you'll likely be the only one there, away from the clamor of tourists."
Hiking off the road to go see it was totally worth it not that it was too far. I'm not sure if it's swimmable but it sure was still and peaceful.
Cas McDon
Google
Lovely beach for the entire family
Klaus Nieland
Google
Ein Fluss den man mit kleinen Booten herauf fahren kann. Spaziergänge an ihn sind auch möglich. Das Wasser ist nicht so schwarz wie es aussieht, denn das kommt vom Flussbett das mit dunklem Schlamm bedeckt ist.