5 of the Best Rivers for Fly Fishing in Estes Park

Your guide to casting in Colorado’s most scenic mountain waters
Estes Park, Colorado, isn’t just a gateway to Rocky Mountain National Park — it’s a bucket-list destination for fly fishers across the country. With alpine streams, freestone rivers, and high-elevation lakes, there’s no shortage of waters to explore.
If you’re planning a guided fly fishing trip or going solo, here’s a rundown of the best rivers for fly fishing in Estes Park, what you’ll catch, and why each river offers something special.

Big Thompson River (Below Lake Estes)

Best For: Year-round access, wild brown trout, easy walk-in access
The Big T is a local favorite and a staple of our guided fly fishing trips. Flowing out of Lake Estes, this tailwater maintains stable flows and cooler temps, making it fishable almost every month of the year.
You’ll find:
• Wild browns and rainbows in the 10–16” range
• Pocket water and riffles perfect for dry-dropper setups
• Excellent winter fishing conditions
Pro Tip: Early spring and fall see fewer anglers and stronger bites. Great for half-day trips.

Fall River (Inside Rocky Mountain National Park)

Best For: Scenic dry-fly action, smaller wild trout, beginner-friendly casting
This picturesque stream runs along Highway 34 and offers multiple pull-offs for short walk-ins. Its pools and glides make it ideal for kids or new anglers learning dry-fly techniques.
Catch:
• Small brook and brown trout
• Greenback cutthroat in upper sections
Pro Tip: Use smaller flies (#16–20) and longer leaders for spooky fish.

Thompson River Headwaters (In Moraine Park & Glacier Basin)

Best For: Backcountry adventure, greenback cutthroat sightings
This is the birthplace of the Big Thompson, with meadows and braided channels full of native fish. The flat landscape makes for easy hiking, and summer hatches bring out aggressive surface strikes.
Fish you’ll find:
• Wild greenback cutthroat trout (Colorado’s state fish)
• Brook trout in higher elevations
Pro Tip: Carry bear spray and start early—this area is shared with elk, moose, and black bear.

Roaring River (Accessible via Lawn Lake Trail)

Best For: Remote feel, challenging terrain, solitude
A hidden gem for serious anglers, Roaring River is steep, fast, and lightly fished. It’s a strenuous hike in, but the reward is alpine beauty and very little fishing pressure.
Catch:
• Brook and greenback cutthroat trout
• Possibly some hybrid strains near junction pools
Pro Tip: Best fished in late summer once runoff subsides. Great for full-day guided trips.

Bonus: St. Vrain Creek (Near Wild Basin)

Best For: Technical nymphing, dry-dropper rigs, a change of pace
Though slightly outside town, this creek system is a fantastic side mission. It offers technical fishing, deep plunge pools, and varied bug activity—perfect for anglers looking to level up.
Pro Tip: Use small midges and stonefly nymphs in deeper slots during runoff season.

What to Bring for Fly Fishing in Estes Park

Whether you’re going solo or with a guide, packing the right gear makes all the difference. We recommend:

8.5–9ft 4–5wt fly rods for all-around versatility

Dry-dropper rigs with size 14–20 flies

Waders and felt-bottom boots for better grip

A daypack with water, snacks, sunscreen, and bug spray

Don’t worry if you’re not fully outfitted—our guided trips include all the essential gear and expert setup so you can focus on the fishing. Prefer to explore on your own? Scot’s Sporting Goods has everything you need for a successful day on the water. Whether you’re looking to rent high-quality gear or invest in your own setup, we’ll get you dialed in and ready to cast.

Want to Explore These Rivers with a Pro?

At Scot’s Sporting Goods, our licensed, local guides offer guided fly fishing trips in Estes Park that include:
• Full gear setup
• Expert instruction
• River selection based on conditions, species, and your goals
Whether you want to learn how to cast, chase greenback cutthroat, or fish the hidden pockets of the Big Thompson, we’ve got you covered.
Book your trip now or call us at (970) 586-2877