Terrestrial bite builds on Yellowstone and Missouri trout water

What's biting

What's next

Flow at USGS gauge 06043500 sat at 960 cfs as of 5 p.m. Friday, a stage that should hold roughly steady into the weekend barring a thunderstorm bump — typical for early July before peak-heat drawdown really sets in. With Montana FWP flagging a summer outlook that leans hotter and drier than normal after this past winter's thin snowpack, expect flows to trend down and water temperatures to climb through the back half of July; that's exactly the trend FWP's virtual townhall this week was built to get ahead of, and it's what the agency's new TroutCast tool (launched June 1) is designed to track on Montana's blue-ribbon rivers. Anglers planning trips to Yellowstone-system water should keep an eye on afternoon water temps as the week progresses — as flows drop and days heat up, the standard move is to front-load fishing into early morning and push toward evening, giving fish a break during the hottest midday hours. That's typical practice on Montana trout water this time of year, not a specific closure or restriction reported here, so check current FWP guidance before heading out.

On the terrestrial front, expect the bite Trout Unlimited flagged this week — pink terrestrial patterns working banks and undercuts — to keep building through the weekend and into next week as grasshoppers, ants, and beetles become a bigger share of what's landing on the water. That's a natural progression for early-to-mid July and should carry solid dry-fly interest on both the Yellowstone and Missouri systems over the next several days, especially during warm afternoon breezes that blow bugs off the banks.

On the Missouri system, Canyon Ferry Reservoir's walleye should stay a dependable target through the weekend; FWP and Walleyes Unlimited of Montana's push to keep more of the smaller fish suggests a strong year class is in the system right now, which typically means steady action even if the biggest fish get more selective as the water warms. With the moon in its Last Quarter phase, no strong lunar feeding window stands out this week — plan around morning and evening light rather than moon timing.

Context

The angler-intel feeds available this week don't include region-specific catch reports for Yellowstone or Missouri river trout, or for Canyon Ferry walleye, beyond Montana FWP's program and management notes — so a direct season-to-date comparison isn't possible from what's on hand here, and it's worth saying that plainly rather than padding it out. What is clear from FWP's own reporting is that this summer is shaping up drier than typical: the agency is explicitly citing a low-snowpack winter and a summer forecast running hotter and drier than normal, which is why it launched the TroutCast drought-forecasting tool on June 1 and convened a virtual townhall specifically to prepare anglers and fisheries managers for what's ahead. That's a meaningfully different backdrop than a normal-snowpack year, when Montana's blue-ribbon rivers typically hold cooler, higher flows well into July.

At 960 cfs, the Missouri-system reading on file is a single snapshot rather than a trend line, so whether that's running above or below the seasonal average for this gauge isn't something we can confirm from the data provided. The Canyon Ferry walleye harvest message (keep more small fish) is a standard, recurring FWP and Walleyes Unlimited of Montana management note rather than a new development — consistent with an established, self-sustaining fishery rather than anything unusual for early July. Overall, expect this season to run warmer and drier than a typical Montana summer, with earlier pressure on afternoon water temperatures than a wetter year would bring.