Montana fishing reports
222 reports for Montana — what's biting, water temps, and where to focus.
Fall brown trout season builds on the Yellowstone and Missouri
Water temperatures across our Montana gauges sit in the low to upper 40s this week, a range that typically puts trout into their fall pattern. USGS gauge 06041500 reads 46°F at 1,210 cfs and gauge 06041000 reads 47°F at 1,220 cfs, while gauge 06043120 shows 42°F at 228 cfs. Gauge 06043500 reports 350 cfs with no temperature reading. Flylords Mag notes that it is past mid-October, so in many areas the brown trout spawn is in full swing, with fish digging redds and paired up. The same piece says the spawn brings predictably good fishing as fish vie for prime lies and others feed on a buffet of eggs. Trout Unlimited's tip is to let a drift ride rather than rip the fly off the water after a slightly off cast, which avoids spooking a fish in the feeding lane. Flylords Mag also lists five fall hatches to fish before winter, and Caddis Fly (OR) reports afternoon and evening hatches of October caddis, Mahogany duns, blue-winged olives and small stones in its own region. That is a useful hatch guide for the same time of year, not a Montana report.
Fall trout window opens on Yellowstone and Missouri waters
Cool, steady water is setting up a fall pattern across southwest Montana. USGS gauge 06041500 reads 1,230 cfs at 47°F, and gauge 06041000 shows 1,200 cfs at 47°F. Gauge 06043120 runs 232 cfs at 46°F, and gauge 06043500 reports 350 cfs. Those temperatures sit in the range where Brown Trout tend to feed with purpose and move toward spawning water. Per Flylords Mag, it is past mid-October and the brown trout spawn is in full swing in many areas, with fish digging redds and a buffet of eggs drawing other trout. Flylords Mag also notes that fish paired up on redds should be left alone. Trout Unlimited and Hatch Magazine both stress careful handling this time of year, so keep fish in the water and avoid wading through gravel where redds sit. Caddis Fly (OR) reports afternoon and evening hatches of October Caddis, Mahogany Duns, Blue Winged Olives, small stones and assorted small caddis, and lists a jigged articulated sculpin and the perdigon as fall producers. That report is from Oregon, so treat it as a seasonal template rather than a local hatch chart. Reno Fly Shop (NV) describes trout focused on small bugs such as Blue Winged Olives and midges as fall settles in.
Fall brown trout push builds on Yellowstone and Missouri tributaries
Gauge readings show cool, stable water across the region this week. USGS gauge 06041500 reads 1,230 cfs at 53°F, while gauge 06041000 shows 1,200 cfs at 47°F and gauge 06043120 shows 232 cfs at 48°F. Gauge 06043500 reports 350 cfs. Those temperatures sit in the range where fall fish feed steadily through the middle of the day. Flylords Mag notes that it is past mid-October and the brown trout spawn is in full swing in many areas. Fish are digging redds and pairing up, and the same piece points to predictably good fishing as fish vie for prime lies and others feed on drifting eggs. Flylords also cautions anglers to avoid standing on or dragging fish off redds. Caddis Fly (OR) describes afternoon and evening hatches of Blue Winged Olives, October Caddis and small stones on its home water, a useful pattern guide even though it is a different state.
Fall brown trout push into pre-spawn mode on Montana freestone water
Brown trout are the story this week. Flylords Mag notes that past mid-October the brown trout spawn is in full swing across many regions, with fish digging redds and paired up, and that the predictably strong fishing comes as fish vie for prime lies and others feed on eggs. Flylords also flags that anglers should avoid targeting fish on redds. A separate Flylords piece says autumn is streamer season, as cooling water and fading insects push trout toward baitfish and sculpins. Our gauge readings fit that picture. USGS gauge 06043120 shows 42°F water at 232 cfs, while gauges 06041500 and 06041000 read 46°F and 48°F with flows around 1,230 and 1,210 cfs. Those temperatures sit in the range where browns turn aggressive and territorial.
Fall brown trout move into pre-spawn mode on southwest Montana rivers
Gauge readings across the region show cold, low-to-moderate water this week. USGS gauge 06041500 reads 1,230 cfs at 52°F, gauge 06041000 reads 1,220 cfs at 47°F, and gauge 06043120 shows 237 cfs at 48°F. Gauge 06043500 reports 355 cfs. Those temperatures sit in a comfortable range for trout and point to steady fall feeding. Flylords Mag notes that the brown trout spawn is in full swing in many parts of the country this week. Fish are digging redds or pairing up, and that brings strong fishing as trout compete for prime lies and feed on drifting eggs. The same piece adds a caution: avoid wading through redds and don't pose fish pulled off them. Flylords Mag also reports that trout are hunting baitfish and sculpins as insects fade, which makes autumn streamer season. Their tip is to drift streamers rather than only strip them. Trout Unlimited's weight tip is useful on these flows: how much weight you add to a nymph rig matters, so adjust it to the depth and speed of each run. Typical choices for this window are small midges, baetis patterns and egg or sculpin imitations.
Yellowstone and Missouri trout shift toward fall streamer and baetis windows
Gauge readings across the Yellowstone and Missouri country point to a cold, settled river this morning. USGS gauge 06043120 shows 237 cfs with water at 42°F, while USGS gauge 06041500 reads 1,230 cfs at 44°F and USGS gauge 06041000 reads 1,210 cfs at 46°F. USGS gauge 06043500 reports 360 cfs. Those temperatures sit in the range where Brown Trout shift from summer feeding to a fall pattern of bigger meals and tighter holding water. Flylords Mag notes that autumn is streamer season, with trout hunting baitfish and sculpins as insects fade, and it recommends drifting streamers in early autumn. Caddis Fly (OR) reports afternoon and evening hatches of Blue Winged Olives and small caddis this month, a useful pattern guide for the smaller bugs still showing up on cold water.
Fall Brown Trout Window Opens on Cooling Montana Rivers
Gauge readings across the Yellowstone and Missouri drainages show water at 46°F at three USGS sites (06043120, 06041500 and 06041000), a cool range that typically puts Brown Trout in pre-spawn mode and more willing to chase a meal. Flows were 241 cfs at gauge 06043120, 1,230 cfs at 06041500, 1,200 cfs at 06041000 and 355 cfs at 06043500, a modest, fishable range for mid-October. Per Flylords Mag this week, autumn is streamer season as trout pack on calories before winter, and an angler story there describes sight-fishing a big fall brown sipping the surface on a bright, clear day.
Yellowstone and Missouri cool into a fall streamer window
Water is cooling into the upper 40s and low 50s across the Yellowstone and Missouri drainage, which is the cue that shifts trout toward fall feeding. USGS gauge 06043120 reads 237 cfs at 48°F, gauge 06041000 shows 1,220 cfs at 46°F, and gauge 06041500 reads 1,230 cfs at 51°F. Gauge 06043500 is running 360 cfs. Flylords Mag notes that with water temperatures dropping and insects fading, trout turn to baitfish and sculpins as they pack on calories before winter, making early autumn streamer season for Brown Trout.
Yellowstone and Missouri trout settle into a cooling fall pattern
Water is cold and running steady across the region. USGS gauge 06041500 shows 1,280 cfs at 46°F, and gauge 06041000 reads 1,230 cfs at 46°F, while gauge 06043120 runs lower at 237 cfs and 41°F and gauge 06043500 reads 360 cfs. Those temperatures sit in the range where Brown Trout shift from summer feeding to pre-spawn aggression. Per Flylords Mag, autumn is streamer season as trout hunt baitfish and sculpins to pack on calories before winter, and the same piece recommends drifting streamers in early fall. Trout Unlimited also notes that weight on a nymph rig matters, a useful reminder when flows are up and fish are holding deep.
Flathead and Bitterroot anglers get a classic mid-October window
The Bitterroot-area gauge (USGS gauge 12372000) shows 7,210 cfs and 54°F water this morning, a full, cool flow that sits in the comfortable range for fall fish activity. Streamer season is the theme across the fly-fishing press. Flylords Mag says that with temperatures cooling and insects fading, trout turn to baitfish and sculpins to pack on calories before winter, and it recommends drifting streamers in early autumn. Caddis Fly (OR) lists a jigged articulated sculpin and a perdigon as fall patterns. A Flylords Mag angler story also credits cooler, rainy weather with keeping high alpine fish biting all day.
Yellowstone and Missouri trout shift to streamer season
Water temperatures are holding at 46°F across three USGS gauges (06043120, 06041500 and 06041000), with flows of 246 cfs, 1,320 cfs and 1,290 cfs. That is cool, stable autumn water. Per Flylords Mag, early autumn is streamer season, as cooling water and fading insect activity push trout to hunt baitfish and sculpins to pack on calories before winter. A Flylab (Substack) essay on drifting the Yellowstone in fall framed the river's cottonwoods and clear water as classic October scenery.
Fall Brown Trout Window Opens on Yellowstone and Missouri Systems
Cooling water is setting the pace this week. USGS gauge 06041500 reads 52°F at 1,340 cfs, while gauge 06041000 shows 46°F at 1,290 cfs and gauge 06043120 sits at 49°F with 232 cfs. That spread of temperatures, all comfortably in trout range, points to fish feeding steadily through the middle of the day. Flylords Mag notes that early autumn is streamer season, with trout hunting baitfish and sculpins to bulk up before winter, and recommends drifting streamers rather than only stripping them. MT FWP Fishing News reports that spawning closures on some rivers begin October 1, so check current Montana regulations for the water you plan to fish.