it runs year round. but the creek is designated for the breeding of wild native trout - so unlike so many other creeks in california - its not stocked by the dept of fish and game. the limit is 2 trout and they encourage catch and release.
one of my first thoughts was -- geesh i could have that pool stocked with fish and have my own fishing hole for the kids - but cant do it. its a very pristine area and they want to maintain it that way.