Having worked for the people who stock it, I can tell you that there are a bunch of different factors including water temps, forecasts, available stocking fish etc. So there is no hard and fast rule. You should be able to look on the DNR website and tell what they have stocked in the past week, but they dont release the schedule in advance.
The D.N.R site tells you when it is stocked .we seen it was stocked one time this year
Never seen any trout.
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