River Trout Life Cycle?

[Cantstopfishing]

After catching some really nice fish on the Weber today I started getting a little curious on the life cycle of river fish. I know we have some great biologists and other fishing experts on this site so I thought I see if anyone could give me a brief overview.

The main thing I am wondering is if fish tend to stay in roughly the same area of a river for most of their life, or if they will travel up and down large distances of on the river. Kind of a follow up question is if I go fishing the same spot I went today next week or in a few days is it likely to be most of the same fish in that section of the river or will they most likely have moved on?
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[HD7000]

another question to add to the good questions already asked...How long do average brown trout live? Would a 5 yr old be considered a grandpa, or just average?
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[BHuij]

I definitely don't fit into the "fish expert" or "biologist" category, but I recently read that browns can live up to 10 years, or in rare cases, even a few more.
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[pookiebar]

Browns can live 10-20 years. Though the older fish are no longer viable spawners they can be truly huge. In fact I would encourage people to take that trophy brown trout (26 inches plus) home if you want to get it mounted. The fish likely is no longer spawning and that is why it is getting bigger and bigger. No energy spent on the spawn cycle translates into just becoming a monster. But the food it is consuming may help the smaller fish grow to better size if made available by eliminating the monster at the top.

Younger spawning fish tend to move up and down a stream at key periods of the year, spring and especially fall in search of other spawning fish. An older fish with no spawning drive will take up a prime hole and will just stay there.
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