I don't recall the exact timing, but I think it was towards the end of Sept or early Oct.
If you're bank bound, try casting small spoons and spinners or try bottom fishing or bobber fishing with white corn, meal worms\maggots or worms from the WDFW boat launch or from the sandy beach at the park (try early morning or evening). Just start trying about mid sept and listen for reports. They'll show up eventually...