The Missouri River isn’t just a fishery; it’s an experience. From its bug-rich waters to its striking landscapes, this tailwater exemplifies what makes Montana’s fly fishing so legendary. Formed at the confluence of three famous rivers—the Madison, Jefferson, and Gallatin rivers—its size and grandeur are matched only by its significance in history, as it played a vital role in the Lewis and Clark expedition. Today, the river continues to captivate adventurers and fly fishers with its untamed beauty and exceptional blue-ribbon fishing opportunities.

What Makes The Missouri River Special?

Several factors contribute to the Missouri River’s status as a premier tailwater fishery:

• Consistency: A tailwater fishery with stable water flows out of Holter dam. Steady outflows and consistent temperatures ensure year-round fishing opportunities, unlike many rivers that are subject to runoff and seasonal extremes.
• Prolific Insect Hatches: Throughout the year, the river teems with insect activity, making it a haven for dry fly enthusiasts, nymphers, and even streamer junkies.
• Accessibility: The river’s proximity to Helena, Great Falls, and Bozeman makes it easily accessible for anglers. Public access points and boat ramps are plentiful, allowing for both wade and drift boat style fishing.
• Diverse Fishing Styles: Whether you prefer sight casting dry flies to pods of sipping trout, fishing nymph rigs through deep runs, or stripping streamers for big aggressive brown trout, the Missouri River offers it all.
• Scenery: Beyond the fishing, the river’s scenery, wildlife and geology is second to none. Towering canyon walls, rolling prairie, and iconic big skies make every moment on the water memorable.

Trout Species on the Missouri River

This mighty Missouri boasts some of the highest trout densities in the state. Fish counts from Holter Dam to the town of Craig are approximately 7,500 fish per mile. The trout in this section are known for their size and strength, with many fish measuring over 20 inches.

Best Seasons for Fly Fishing the Missouri River

Each season brings its own delights for fly anglers on the Missouri River.

Spring heralds the beginning of the fishing season, with the river awakening from its winter slumber. As temperatures rise, hatches become more prolific, and trout become increasingly active, eagerly feeding on emerging insects.

Summer brings long days and warm temperatures, with prolific hatches of caddis, PMDs, terrestrials, and trico mayflies.

Fall casts a spell of tranquility over the Missouri River. The crowds thin, and the landscape transforms into a kaleidoscope of vibrant colors. Cooler temperatures trigger a resurgence of insect activity, with blue-winged olives and midges dominating the menu. It’s a season of quiet and the chance to land some of the river’s largest trout before winter sets in.

Winter may seem like an unlikely time to fish, but it offers solitude and the opportunity to catch trophy trout. Midge hatches provide the main source of sustenance for trout during these colder months. Nymphing deep pools and runs can yield impressive results.

Whether you’re a seasoned angler chasing trophy trout or a newcomer eager to learn, the Missouri River promises a rewarding adventure.