Our weather forecast for the next week or so is calling for drastically below normal temperatures. Some days will see highs in the 50s even at low elevations! Runoff is now on the downward track everywhere, so this shot of cold weather is going to temporarily pull our normal summer rivers out of runoff. The Boulder in particular should be ready to float for the season by Monday and will probably not become unfishable again. The Yellowstone will be more marginal, but for anglers who want to “swing for the fences,” these runoff breaks are great times to pound the banks with streamers and stonefly nymphs.
Here’s the graph of predicted streamflows for the Boulder. It is fishable from 3000 down to about 500cfs. 800-2000 is prime. As you can, it’s looking great for next week.
Here’s the graph for the Yellowstone at Corwin Springs. We consider the Yellowstone fishable when it’s at a bit over 10,000cfs at this gauging station, though 8,000 is better.
If the above predicted flows hold out, we expect excellent float conditions for experienced anglers from Sunday the 23rd through the last full week of June, with conditions deteriorating on the Yellowstone in particular for a week or so thereafter.
Availability for Boulder River trips is limited to June 26. Availability for Yellowstone River trips is limited to the 24th-27th and the 29th. Because the above flows are not guaranteed, we would not be willing to accept a float trip booking unless clients are staying in a location (Gardiner, Livingston, Paradise Valley, Mammoth, Bozeman) where they would be able to head over to the Lower Madison for the float if the above doesn’t pan out. Want to roll those dice? We often see some of our best big fish fishing of the year during runoff breaks like those we expect.