What bamas said, look for creeks that are smaller they clear up first. The biggest creek have more run off and take longer to clear up. Mostly just got to burn some gas and find out for yourself. I fished a large creek yesterday but it has 3 small branches the feed it 2 of them had clean water it the back and I found fish in both. 90% of the lake was chocolate milk. It's mostly years of experience of fishing bad conditions. I doubt I could do it on a new lake but you have to start somewhere.

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