person holding a fish with net while fly fishing in colorado

The Ultimate Guide to Fly Fishing in Colorado

Colorado, known for its breathtaking landscapes and alpine ecosystems, has long been a premier destination for fly fishing. Its rich fly-fishing heritage dates back to the early 1900s, with anglers flocking to the state’s pristine rivers and lakes. Over the years, Colorado has become a hub for angling enthusiasts, providing a unique blend of natural beauty, exceptional fishing conditions, and world-class experiences. Today, Colorado remains one of the most sought-after fly fishing destinations in the United States, offering opportunities for anglers of all levels to test their skills in some of the country’s most iconic waters.

What Makes Colorado Ideal for Fly Fishing?

man holding fish on guided upper colorado float fishing trip

Colorado’s climate and diverse natural features make it an ideal destination for fly fishing. The state’s combination of sunny weather, cool mountain air, and seasonal runoff creates optimal conditions for healthy fish populations. Anglers often find themselves fishing for various species, such as rainbow trout, brown trout, and the native cutthroat trout, which thrive in Colorado’s pristine waters. From the rushing rivers like the South Platte and Arkansas to serene high-mountain lakes, Colorado offers some of the most iconic fly-fishing experiences in the U.S. Alpine lakes and streams nestled in Colorado’s high country provide a unique challenge, often accessible only by hiking into remote wilderness areas. With such an array of landscapes and abundant trout species, Colorado has earned a reputation as one of the best places for fly fishing in the United States.

Best Fly Fishing Spots in Colorado

woman holds fish during colorado float fishing trip

Colorado River

The Colorado River, known for prime fishing areas such as Gore Canyon and Byers Canyon, teeming with rainbow and brown trout, offers some of the best fly-fishing in Colorado.

Gunnison River

The challenging waters of the Gunnison River, remote and beautiful, are perfect for those seeking a more adventurous experience, where anglers can target brown trout and cutthroat trout.

Arkansas River

The Arkansas River is a top choice for anglers looking for consistent conditions and great catches, particularly rainbow and brown trout, with helpful tips focusing on fishing during early mornings or late evenings for the best results.

Clear Creek

Just a short drive from Denver, Clear Creek offers easy accessibility and a variety of fish species, all set against a stunning mountain backdrop.

Rio Grande

The Rio Grande is another hidden gem, providing excellent fishing for rainbow and brown trout, while nearby points of interest like the San Juan Mountains make it a scenic destination.

High Alpine Lakes

High alpine lakes like Dream Lake and Maroon Lake offer unique challenges for fly fishers, requiring effort to reach but rewarding anglers with serene surroundings and stunning views.

Other Notables

Additional notable spots such as the South Platte River and the Blue River round out Colorado’s reputation as a fly fishing paradise.

Fly Fishing Techniques and Gear

fly fishing rod and reel

Techniques by Water Type

  • Rivers (Colorado, Gunnison) – Nymphing with weighted flies helps reach deeper pools.

  • Summer Conditions – Use dry flies when trout are feeding near the surface.

  • High Lakes – A slow retrieve with streamers works well in alpine waters.

Fly Selection by Season and Species

  • Spring and Summer – Caddis and mayfly patterns are especially effective.

  • Winter – Try scud or midge imitations, particularly in tailwaters.

Ethical Fishing Practices

  • Use barbless hooks to reduce harm

  • Handle fish gently and release quickly

  • Avoid fishing during spawning seasons

  • Practice catch-and-release, especially in heavily fished waters

What to Pack for a Fly Fishing Trip in Colorado

Preparing for a successful Colorado fly fishing trip requires careful attention to the state’s demanding natural environments. Essential items include a sturdy pair of waders to keep comfortable in cold mountain streams and rivers, along with polarized sunglasses to reduce glare and help spot fish beneath the water’s surface. Insect repellent is a must, especially during the warmer months when mosquitoes and biting flies are most active. For Colorado’s varied landscapes, a versatile rod and reel, typically a 5-weight rod for most rivers and lakes, is important, along with a selection of flies suited to the season and fish species. A rain jacket and layered clothing are crucial due to the unpredictable mountain weather, ensuring you’re prepared for sudden temperature drops or showers. Finally, a sturdy backpack or chest pack to organize your gear and a valid fishing license are key to ensuring a smooth and successful fishing adventure.

  • Waders

  • Polarized Sunglasses

  • Insect Repellent

  • Rod and Reel

  • Rain Jacket and Layers

  • Backpack or Chest Pack 

  • Fishing License – Required for all anglers in Colorado

Guided Fly Fishing Tours: Why They're Worth It

Rocky Mountains with the Gunnison River cutting through the landscape with some of the best rafting in Colorado

For those looking to elevate their Colorado fly fishing experience, guided tours provide numerous benefits that enhance the overall adventure. A knowledgeable guide offers insider tips on local fishing hotspots, seasonal patterns, and the best techniques tailored to specific waters. Guides also ensure your safety, helping navigate unfamiliar terrain, identify hazards, and make the most of your time on the water. Downstream Adventures offers excellent guided tours led by experienced guides who know Colorado’s rivers and lakes intimately.

Whether you’re a beginner or a seasoned fly fisher, their tours promise an enriching, hassle-free experience with all gear and permits taken care of. If you want to create unforgettable memories on the water, exploring guided fly fishing tours with Downstream Adventures is an ideal way to do so. By mastering the right techniques, preparing with the right gear, and considering guided tours, adventurers can experience the best fly-fishing in Colorado!

Picture of Downstream Adventures

Downstream Adventures

Downstream Adventures was started by two brothers with a deep love for the outdoors and whitewater rafting. We are excited to bring our passion to you by sharing our knowledge of the area and what makes it so great!

Share this post:

Recent Posts

  • Area Info
  • Blogs
Photo by Lauren Lopes on Unsplash
November 11, 2024

Denver offers a gateway to Colorado’s vast outdoor wonders, making it the perfect starting point for unforgettable adventures in the Rocky Mountains. Whether you’re seeking exhilarating outdoor activities near Denver,...

Guide to the Best Whitewater Rafting in Colorado
December 13, 2024

Colorado is a Meca for outdoor adventurers, and whitewater rafting tops the list of must-try experiences in the Centennial State. From scenic family-friendly floats to adrenaline-pumping Class V rapids, Colorado’s...