Big Hole Surges 21% While Madison Holds Steady: Montana Rivers March 14, 2026

We’re seeing a tale of two Montanas today, folks. The classic southwest freestoners—Madison, Gallatin, and Yellowstone—remain in beautiful mid-winter stability with excellent clarity and wadeable flows. Meanwhile, western Montana is getting its first real taste of early spring as the Big Hole jumped 123 cfs overnight, the Bitterroot surged 22%, and the Clark Fork and Blackfoot are climbing steadily. With snow and rain hammering the state today and temperatures crashing tonight, conditions are about to shift hard over the next 48 hours.

Madison River — Southwest Montana

The Madison is fishing like a dream right now. At 349 cfs, flows are absolutely textbook for mid-March—low enough for easy wading and great clarity, but with enough current to keep fish active. Water temp at 43.2°F puts us right in that magic zone where trout are starting to think about feeding more aggressively, especially during the warmest part of the afternoon.

The flow has been rock-solid stable all week, bouncing between 326-349 cfs, which means fish have settled into predictable feeding lanes. However, with today’s rain/snow mix and falling temperatures tonight (dropping to 14°F in Bozeman), expect some minor fluctuations and possibly off-colored water by Sunday if we get significant precipitation.

Fishing Strategy: Focus your efforts between 11 AM and 3 PM when water temps climb closer to 45°F. Midges are the name of the game right now—size 18-22 zebra midges, mercury midges, and disco midges in the film. Tailwater sections below Ennis Lake and Quake Lake are producing consistently. Nymph rigs with a small beadhead prince dropper under your midge can pick up bonus fish. The $3 Bridge and Varney Bridge accesses are your best bets for easy walk-and-wade.

Gallatin River — Southwest Montana

The Gallatin is sitting pretty at 301 cfs—perfect winter fishing flows that offer excellent visibility and manageable wading throughout most of the canyon. We don’t have water temp data today, but expect it’s tracking similar to the Madison given the stable weather pattern we’ve had this past week.

Like the Madison, the Gallatin has been remarkably consistent, hovering in the 267-304 cfs range. This stability is gold for anglers because fish establish predictable feeding patterns. The canyon stretch from Big Sky to the mouth will fish well until today’s weather moves in.

Fishing Strategy: The Gallatin rewards technical nymphing right now. Focus on deeper runs and pockets with stonefly nymphs (size 8-12 black or brown) paired with a trailing midge or small pheasant tail. The seams behind boulders are holding fish. If you’re swinging streamers, go small and sparse—size 6-8 sculpins in olive or black. Hit the lower canyon near the mouth for slightly warmer water. Greek Creek, Moose Creek Flat, and the Squaw Creek access points offer good entry options.

Yellowstone River — Southwest Montana

At 1,320 cfs, the Yellowstone is running beautifully for March conditions. Flows have been stable in the 1,160-1,320 range all week, and that consistency shows in the fishing reports we’re hearing. No temp data available today, but this stretch typically runs a few degrees cooler than the Madison.

The week-long stability is excellent news—it means clear water and predictable fish behavior. Today’s precipitation could cloud things up slightly by tomorrow, but the Yellowstone clears faster than most folks expect during winter.

Fishing Strategy: The Paradise Valley stretch from Livingston to Springdale is your target zone. With these flows, you can access runs that are blown out during runoff. Deep nymphing with heavy tungsten beads is essential—think size 10-14 Pat’s Rubber Legs, copper johns, and hare’s ears. Use 5-6 feet of indicator spacing to get down in the deeper buckets. Streamers can be productive in the afternoon—articulated patterns in black, olive, or white, size 4-6. Try Mallards Rest, Pine Creek, and Emigrant access points.

Big Hole River — Southwest Montana

Here’s where things get interesting. The Big Hole jumped from 597 cfs yesterday to 720 cfs today—a sharp 21% increase that signals the beginning of early spring dynamics. Water temp at 38.3°F is chilly but not prohibitive. Looking at the trend, flows have nearly doubled from 475 cfs a week ago to today’s 720 cfs.

This rise is likely from daytime warming melting lower elevation snowpack, combined with today’s rain. With snow in the forecast tonight and colder temps through Sunday, I’d expect flows to stabilize or even drop slightly this weekend before climbing again Monday when temps rebound.

Fishing Strategy: The Big Hole gets tricky when it’s rising and the water is this cold. Your best window is going to be late morning to early afternoon when temps peak. The water may be slightly off-color now, so upsize your flies and add some flash. Size 6-10 rubber legs in black or brown, size 10-12 beadhead pheasant tails with red wire, and San Juan worms in red or pink will get noticed in murky water. Focus on slower inside seams and softer pockets rather than main current—fish are conserving energy in cold water. The Maidenrock, Divide, and Melrose sections fish well, but call a local shop for current clarity reports before making the drive.

Missouri River — Central Montana

The mighty Mo is locked in at 3,240 cfs with a water temp of 42.6°F—absolutely prime conditions for March fishing. This tailwater has been incredibly consistent all week, varying only between 3,210-3,350 cfs, which is exactly what you want from a dam-controlled fishery.

The Missouri is less affected by weather than freestone rivers, making it your best bet when storms roll through. That said, Great Falls is getting hammered with snow today (2-4 inches expected with another 1-3 inches tonight), so access and driving conditions may be sketchy rather than the fishing itself.

Fishing Strategy: The Missouri is a nymphing machine right now. Classic setups work best—sowbug or scud patterns (size 14-18) with a trailing midge emerger. The fish are feeding consistently throughout the day, though the 10 AM-2 PM window is still optimal. Don’t overlook streamers—the Missouri’s big browns are actively feeding, and a well-presented articulated leech or bugger can produce trophy fish. Focus on the classic runs: Wolf Creek Bridge to Cascade (best public access), the Dearborn River confluence area, and Craig to the Pelican Point float. If you’re floating today, be prepared for wind gusts to 28 mph and snow—bring extra layers.

Clark Fork River — Western Montana

The Clark Fork is rising steadily at 2,320 cfs, up 10% from yesterday and climbing 590 cfs over the past week. Water temp is a cold 34.9°F—just barely above freezing—which definitely impacts fish activity. This rise is textbook early spring behavior as lower elevation snow starts melting during warmer afternoons.

With snow forecast for tonight (1-3 inches in Missoula) and continued moisture through Monday, expect the Clark Fork to keep climbing. The water is likely showing some color now, and clarity will deteriorate further as precipitation continues.

Fishing Strategy: Cold water and rising flows mean you need to slow down and go deep. Fish will be holding tight to the bottom in slower water—inside bends, back eddies, and tailouts. Use heavy split shot or sink tips to get big stonefly nymphs (size 4-8) and rubber legs down where fish can see them without expending much energy. The stretches near Missoula—Schwartz Creek, Harper’s Bridge, and Kelly Island—offer good access. Honestly, the Clark Fork might be a wait-and-see situation. If it continues rising through the weekend, I’d focus your efforts elsewhere until flows stabilize early next week.

Bitterroot River — Western Montana

The Bitterroot is experiencing the most dramatic change in the state, surging 22% overnight from 1,630 cfs yesterday to 2,130 cfs today. Looking back a week, it’s nearly doubled from 1,140 cfs. At 4.47 feet on the gauge, we’re entering high-water territory for winter conditions. No temperature data available, but assume it’s running similar to the Clark Fork—very cold, likely 35-38°F.

This rapid rise combined with today’s snow and tonight’s additional 1-3 inches means the Bitterroot is going to be challenging for at least the next few days. Water clarity is almost certainly compromised, and flows will likely continue climbing.

Fishing Strategy: The Bitterroot is going to be tough this weekend. With these high flows and cold water, fish are going to be tucked into soft water avoiding the current. If you’re committed to fishing it, target the very edges, deep inside bends, and anywhere the current breaks. Use large, heavy, flashy flies—size 4-6 articulated streamers in black or olive with lots of movement, or big rubber legs patterns. The lower river near Missoula (Bell Crossing, Buckhouse Bridge) tends to fish better than upper reaches during high water. Realistically, though, I’d give the Bitterroot a few days to settle down and focus on more stable options.

Blackfoot River — Western Montana

The Blackfoot is rising at a more moderate pace than its western Montana cousins—up 14% to 1,150 cfs, climbing from 862 cfs a week ago. Water temp of 36.7°F is cold but workable. This is a manageable rise that hasn’t blown out the fishery yet, though continued precipitation will keep pushing flows higher.

The Blackfoot’s gradient and character mean it can handle these increases better than some rivers, but you’re definitely seeing early spring conditions developing. Expect some color in the water but still fishable conditions, at least through today.

Fishing Strategy: Focus on the lower Blackfoot near the confluence with the Clark Fork, where water temps tend to run slightly warmer and fish are more active. Nymphing with attractor patterns—size 8-12 Pat’s Rubber Legs, stone flies, and worms—will produce better than technical midge rigs right now. The fish need to see your offering in the off-colored water. Popular access points include Russell Gates (near Bonner), Johnsrud Park, and Whitaker Bridge. Hit it early before more precipitation pushes flows higher. By Monday, this could be a different story depending on how much moisture we receive.

Weather Outlook: Buckle Up for a Rough Weekend

Today is going to be downright nasty across Montana. Southwest Montana is seeing rain transitioning to snow with wind gusts up to 48 mph—not exactly prime fishing weather. Western Montana is getting pounded with snow (100% chance, up to 3 inches today), and Central Montana is in full winter storm mode with 2-4 inches today and another 1-3 inches tonight.

What This Means for Rivers:

• Today through Sunday morning: Expect all freestone rivers to pick up some color from precipitation. The stable rivers (Madison, Gallatin, Yellowstone, Missouri) will handle it better than the already-rising western drainages.
• Sunday: Conditions improve dramatically—partly sunny, calmer winds, and the snow stops. This is your window for good fishing before the next system.
• Monday-Tuesday: Another wet system moves in with rain likely across southwest and western Montana. Temps climb (highs in the low 50s), which means snowmelt will accelerate. Expect flows to rise again, particularly on the Big Hole, Bitterroot, Clark Fork, and Blackfoot.

The tailwater fisheries (Missouri and Madison below the dams) will be your most