The following report is by Montana Angler out of Bozeman:
Drought Closures (fishing prohibited 24 hours) are in effect for the entire Jefferson River starting on August 23.
Streamflows in the Jefferson River at USGS gage in Twin Bridges 06026500 dropped below the Jefferson River Drought Plan closure criteria of 280 cfs (278 cfs).
There is no precipitation forecasted. This closure replaces the hoot-owl restriction in place on the Jefferson River.
The Month Ahead:
The Jeff isn’t the best summer option due to algae drifts and also warmer temps. Once the algae stabilizes and starts dying off later in the summer mornings can be good. It isn’t a high trout count fishery but is a nice place to see fewer boats.
Long Term Fishing Forecast:
The Jefferson will improve when September hits and water temps drop into ideal flows. The Jefferson always has low flows in mid summer from irrigation which causes warmer water temps since it is a lower elevation river. It is more of a spring and fall location.