There’s something timeless about standing knee-deep in the flowing waters of the Colorado River, the sun dipping behind rugged cliffs, casting long shadows on the water’s surface. The silence is only broken by the sound of the river and the gentle swish of a fly line cutting through the air. In the high desert landscapes of the Southwest, fly fishing on the Colorado River is more than a pastime; it’s an experience that ties you to the rhythms of the land and water, to the trout that call these waters home, and to the rural towns that still hold onto the simple joys of life by the riverbank.

This stretch of river, winding through the heart of the Southwest, offers some of the finest fly fishing in the region. Whether you’re chasing rainbow trout or brown trout in the cooler high-altitude waters or venturing into lower elevations where warm water species thrive, the Colorado River is a haven for fly fishers seeking solitude, beauty, and a connection to nature.

The River: A Fisherman’s Dream

Flowing from the Rocky Mountains and carving its way through Colorado, Utah, and Arizona, the Colorado River offers a variety of fishing opportunities throughout the year. Fly anglers are particularly drawn to the sections of the river around Glenwood Springs, Colorado, and the Upper Colorado near Kremmling, where the river is wide, cold, and teeming with trout. In these waters, rainbows, browns, and cutthroat trout thrive, providing a thrilling challenge for seasoned fly fishers.

Further downstream, in the red rock canyons of Utah and Arizona, the river’s character changes. Here, it flows slower and warmer, supporting species like smallmouth bass and carp, providing an entirely different fly fishing experience. Fly fishing on the Colorado River isn’t just about the fish—it’s about the ever-changing landscapes, the unique challenges of the river, and the towns that serve as gateways to these adventures.

The Towns: Stepping Back in Time

Fishing the Colorado River is as much about experiencing the rural Southwest’s small towns as it is about reeling in fish. Glenwood Springs, Colorado, is a prime starting point. This small mountain town, known for its hot springs, is a hub for outdoor enthusiasts. After a long day on the river, there’s nothing quite like soaking in the hot mineral waters that have soothed tired muscles for centuries. There are also plenty of local fly shops where you can stock up on gear, get the latest river reports, and swap stories with fellow anglers.

Further west, Grand Junction offers access to both the Colorado and Gunnison Rivers. This growing town has retained much of its old Southwestern charm while embracing its identity as a fly fishing destination. Here, the landscape shifts to orchards, vineyards, and desert mesas, a stark contrast to the alpine scenery upstream.

If you’re exploring the river in Utah, Moab is a popular stop. While known for its proximity to Arches and Canyonlands National Parks, Moab also serves as a base for fly fishers. From here, you can head to the calmer waters of the lower Colorado, where bass and carp present a new challenge.

In Arizona, the Colorado River flows through the desert town of Page, near Lake Powell. Fly fishers often target the tailwater section below the Glen Canyon Dam, where trophy-sized rainbow trout are known to lurk. The scenery here is unlike anywhere else—a mix of towering sandstone cliffs, wide-open desert, and the deep blue waters of the Colorado.

Seasons and Timing: When to Fish

The Colorado River offers year-round fly fishing, but the best times to fish vary depending on the section of the river and the species you’re targeting.

In the Upper Colorado River, particularly around Glenwood Springs and Kremmling, the prime fly fishing season is from late spring through early fall. As the snowmelt subsides, the water levels stabilize, making the river more accessible and the fishing more productive. The summer months offer dry fly action, with caddis and mayflies hatching regularly. The cooler weather of September and October brings fantastic fall fishing, as brown trout prepare to spawn and become more aggressive.

For the lower sections of the river in Utah and Arizona, the fishing season extends well into winter, thanks to the warmer climate. The tailwater section below Glen Canyon Dam near Page, Arizona, is particularly famous for its winter fly fishing, with anglers enjoying mild temperatures while casting for large rainbows.

Lures and Gear: What to Pack

Fly fishing the Colorado River requires a mix of techniques and gear, depending on where you’re fishing and the time of year.

Upper Colorado River (Glenwood Springs, Kremmling):

For trout fishing in these cooler waters, a 5 or 6-weight rod is ideal. Dry flies are especially effective in the summer, with popular patterns including Elk Hair Caddis, Parachute Adams, and Pale Morning Duns. Nymphing is productive year-round, so be sure to bring along some Pheasant Tail Nymphs, Prince Nymphs, and Copper Johns. When the trout are holding deep, adding weight to your line or using a strike indicator will help you reach them.

In the fall, streamers like Woolly Buggers and Muddler Minnows can trigger strikes from aggressive brown trout. These fish become territorial during spawning season, and a well-placed streamer can often entice a big fish to bite.

Lower Colorado River (Moab, Page):

For bass fishing in the warmer sections of the river, a heavier 7 or 8-weight rod is necessary. Bass tend to strike streamers, so Clouser Minnows and Zonkers are great patterns to use. Carp, often overlooked as a fly fishing target, can provide a thrilling challenge here. Carp prefer slower presentations, so try fishing with San Juan Worms, small crayfish patterns, or nymphs in these sections.

Tailwater below Glen Canyon Dam (Arizona):

This section is well-known for its large rainbow trout, and anglers typically use a 4 or 5-weight rod. Small midges, scuds, and nymphs are incredibly productive here, especially during the colder months. Keep an assortment of Zebra Midges, WD-40s, and RS2s in your fly box, as these patterns are essential for tailwater fishing. Since the trout here are known to be picky, fluorocarbon tippet and careful presentations are crucial to success.

Tips and Tricks for the Colorado River

1. Timing the Hatch: Pay attention to local hatch charts, especially if you’re fishing in the summer. Knowing what bugs are hatching—and when—can make or break your trip. During the summer months, the caddis hatch on the Upper Colorado River is legendary, offering some of the best dry fly fishing in the Southwest.

2. Match the Water Conditions: The Colorado River is known for its fluctuating water levels, especially during spring runoff. In early summer, the river can run high and fast, making it difficult to wade or present a fly. As the water levels drop in late June, the fishing picks up. Fall offers ideal conditions with low, clear water and aggressive trout.

3. Go Deep in Winter: In the colder months, trout tend to hold deep, especially in the tailwater sections. Fishing with nymphs and small midges under an indicator can be highly effective when the water is cold and the fish are less likely to rise to a dry fly.

4. Stay Safe: The Colorado River can be powerful, especially during high water. Always be cautious when wading, and don’t hesitate to use a wading staff for extra stability. If you’re fishing in the more remote sections of the river, let someone know your plans before heading out.

A Rural Fly Fisher’s Paradise

The Colorado River is a fly fisher’s paradise, winding through some of the most breathtaking landscapes in the Southwest. Whether you’re wading in the cool waters of the upper river, chasing trout in the shadow of towering mountains, or casting to bass in the desert canyons downstream, this river offers an adventure for every angler. The rural charm of the surrounding towns, the connection to the river, and the thrill of a fish on the line make fly fishing the Colorado River a truly unforgettable experience.

So grab your rod, pack your flies, and head out to the river where the trout are rising, the sun is setting, and the Southwest is calling your name.