Rafting

How long does this pain last?

Well I've only been downstream
A few miles further from here.
You can see it empties into
A larger body of water
Thereabouts that third bend.
Hard to say what comes of it after that,
Cataracts maybe.

Can't be. It's the ocean no doubt.
I'll beat on upstream a little to the source,
See if I can't track the course from up there.

Up
stream? Suit yourself stranger