I fished the Yakima low in the canyon yesterday. I showed up at 10:00 with a nymph tied on, but the PMDs were already flying. What time does that hatch get started? It was a pretty good hatch and lasted to 2:00 PM, but the fish were pretty much ignoring them and my copies. Later in the afternoon, the action picked up on caddis dries. Every now and then midday, I'd see a great big mayfly flutter by. They were bigger than a March Brown at a size 10 at least, probably a #8. A little smaller than a Hexagenia and not as yellow. More slender than a green drake. Brown and tan with a little cream rather than that dark olive body with a little yellow on a GD. The birds were very interested in them. Are they brown drakes?