March Browns
 

I have never fished the Hendickson's hatch in the park. Let me know
when you go and maybe we can check it out.

As an update, I hit my favorite tributary of the Yellowstone yesterday
and the fishing wasn't outstanding, but still okay. Aside from midges,
no hatches came off although I found plenty of March Browns swimming
about, but not looking like they were ready to hatch just yet.