The water on the East is in full run off right now. It always starts run off early due to a lower elevation snow pack than other fisheries. Flows need to drop well below 100 cfs before any decent wade fishing can result and below 50 is better if you are accessing from bridges and trying to stay in the high water mark.
The Month Ahead:
Once flows drop the East always fishes well over the PMD hatch in late June and early July.
Long Term Fishing Forecast:
The East drops fast and is more of a big stream than a river in the summer months. Ground water and some spring creeks keep water temps good all summer. There are nice hatches but the trout are very spooky so be prepared for more of a spring creek experience in the summer and fall months. This is a different animal than the West Gallatin.