The Yakima has been fishing well with Skwala stoneflies and Baetis. I haven't heard of much March Brown activity yet. Unfortunately, it's been coming up fast with the weekend's warm weather and now the rain. I imagine that it's probably dirty below the mouth of the Teanaway but should be fishable (if high) around Cle Elum and above. It may improve quickly if the freezing level comes down as predicted.