The river is high and dirty. It is mostly likely not a viable option until run off ends later in June. If we get a very significant cold snap that lasts for several days we may see one more fishable window but this big boy takes a lot more to put the breaks on run off than smaller tributaries and rivers.
The Month Ahead:
The river will be blown out for most of June but late June should provide some epic action just in time for the salmonfly hatch. The brainless catching should commence about a week after flows start dropping.
Long Term Fishing Forecast:
The Yellowstone should be a great option all summer and fall. Late June and July should be a home run and August fishing will depend more on temperatures and summer weather patterns but prospects look good at the moment.