Racehorse Tribs - where do they go?

[RichV]

I caught a nice little Cuttie in a Racehorse trib this weekend which got me thinking about where that fish is going to spend the winter. I didn't see any large deep pools on this trib, just deep pockets every so often. Does the entire fish population in that creek move into the pockets for winter, or do some leave for Racehorse/Oldman? Would any return in the spring? Do they spend their whole lives in just one section of a creek, or do they move up and down over the years?

It also seemed Racehorse was clearing out, where are they going?

I didn't get much done at work today, too bust thinking about those fish