Early Spring Fly Fishing on the Big Thompson River

As winter begins to fade in Estes Park, the Big Thompson River transitions into one of its most technical and rewarding fishing seasons. April brings longer days, slightly warmer temperatures, and the first consistent insect activity of the year.

While conditions can still feel like winter, anglers who adjust their approach can find excellent fishing—especially on the tailwater below Lake Estes.

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What to Expect in April

Early spring is defined by low, clear flows and selective trout. Fish remain cautious but begin feeding more consistently as water temperatures slowly rise.

The most important change this time of year is the emergence of Blue-Winged Olives (BWOs), which begin to supplement the ever-present midge hatch.

Key Conditions:

• Cold mornings, improving midday fishing
• Clear water requiring stealth
• Increased activity on cloudy afternoons

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Best Areas to Fish

Below Lake Estes (Tailwater)
This stretch offers the most consistent fishing thanks to stable flows and slightly warmer water. Trout hold in deeper runs, seams, and tailouts.

Big Thompson Canyon
Fishing improves on warmer days. Focus on slower water and protected sections where ice has receded.

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Best Flies for Early Spring

Nymphs:

• Zebra Midge (#20–24)
• RS2 (#20–24)
• Pheasant Tail (#18–22)

Emergers:

• Foam Wing RS2
• Barr’s Emerger

Dry Flies (Afternoon Windows):

• BWO (#18–22)
• Parachute Adams

Streamers:

• Small olive or black Woolly Buggers

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Tips for Success

• Fish late morning through mid-afternoon (10am–3pm)
• Use 5x–6x tippet in clear water
• Focus on slow seams and transition zones
• Prioritize dead drift presentations

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Why Fish the Big Thompson in Spring?

Early spring rewards anglers who enjoy technical fishing and solitude. With fewer crowds and increasingly active trout, this is one of the most underrated times to fish in Estes Park.

Book Your Trip Today!

Spring fly fishing in Estes Park offers eager anglers the chance to shake off winter and chase trout as snowmelt begins feeding local rivers, but success during runoff requires smart adjustments and local knowledge. As flows rise and water temperatures stay cold, trout move toward structure like undercut banks, inside bends, and slower seams where they conserve energy, making deep nymph rigs with added weight and a strike indicator especially effective. Subsurface patterns such as beadhead Pheasant Tails, Hare’s Ears, Zebra Midges, soft hackles, and RS2s consistently produce in slightly off-color water, and fishing late mornings through early afternoons often provides the best window as temperatures climb. Productive early-season stretches include the Big Thompson River below Lake Estes and meadow sections inside Rocky Mountain National Park, where flows can be more manageable and insect activity begins to build. Layered clothing, solid wading traction, and careful attention to river conditions are essential this time of year, but for those willing to adapt, spring delivers fewer crowds, aggressive fish, and the unmistakable feeling that a new fishing season in the Rockies has officially begun. Contact us now to book your trip! 970-720-4986

It’s easy to fall into a routine on the same stretch of river — the same runs, the same flies, the same comfort zone. But some of the best growth as an angler happens when you step into unfamiliar water. Fishing new rivers, lakes, or backcountry stretches forces you to read water differently, adjust techniques, and trust your instincts. It sharpens your skills and reminds you why fly fishing is an adventure, not just a hobby.

New water doesn’t mean far away — sometimes it’s just a trail you’ve never hiked or a bend you’ve never fished. Whether it’s a quiet alpine lake, a small mountain creek, or a river you’ve driven past for years, each new place teaches you something. You learn how fish behave in different currents, how weather and light change the day, and how to solve new problems on the water. Those lessons carry over to every river you fish afterward.

At the heart of it, fly fishing is about exploration. Chasing trout in new places keeps the sport exciting and reminds us that there’s always more to discover, just beyond the next bend

Most people pack up their rods when the snow starts falling — but December is actually one of the most peaceful and rewarding times to fish in Estes Park. With fewer anglers, crystal-clear water, and stable tailwater flows, winter offers a rare chance to experience the Big Thompson River in its quietest, most technical form. Trout become selective and hold in slower, deeper water, which means success comes from precision, patience, and subtle presentations. It’s not about covering miles of river — it’s about slowing down and fishing with intention.

Midday is the prime window in December as water temperatures rise a few degrees and trout become more active. Tiny midge patterns, soft hackles, and small mayfly nymphs fished close to the bottom are the most reliable producers. Light tippet, longer leaders, and careful wading make all the difference when fish are easily spooked in low, clear winter flows. While the action may be slower, every fish feels earned — and the reward is a quiet river, snowy canyon walls, and the kind of stillness you only find in winter.

For anglers willing to embrace the cold, December delivers a truly special fly fishing experience. It’s not about numbers — it’s about solitude, scenery, and connecting with wild trout in a season most people overlook

One of the most important skills in fly fishing has nothing to do with your fly selection or rod choice — it’s knowing how to read water. Anglers who consistently catch trout understand where fish hold and why they choose certain areas of a river.

In this guide, we’ll break down how to read water for fly fishing in Estes Park, so you can quickly identify high-percentage trout water on the Big Thompson River, Fall River, and nearby alpine lakes.

What Does “Reading Water” Mean in Fly Fishing?

Reading water means understanding how current speed, depth, structure, and food availability influence trout behavior. Trout position themselves where they can feed efficiently without expending unnecessary energy.

In simple terms, trout look for:

• Slower water near faster current

• Protection from predators

• Easy access to drifting food

When those elements come together, you’ve found fishable water.

Key Water Features Trout Use in Rivers and Streams

Seams (High-Percentage Trout Water)

A seam forms where fast water meets slow water. Trout often sit on the slow side and feed on insects drifting past in the faster current.

Fly fishing tip: Drift your fly along the seam with minimal drag — this is one of the most productive presentations on Estes Park rivers.

Current Breaks

Rocks, logs, and undercut banks create current breaks that allow trout to hold comfortably. Even small obstructions can support fish.

This is especially important when fly fishing freestone rivers like the Big Thompson River.

Riffles

Riffles are shallow, broken water that provide oxygen and food. During summer months, many trout prefer riffles over deep pools.

Fish riffles thoroughly before moving on — they often hold more trout than anglers expect.

Pools

Pools give trout depth, cover, and consistent food delivery. Focus on:

• The head of the pool

• Cut banks

• Depth transitions

Move slowly and fish pools carefully — trout here are more easily spooked.

Eddies

Eddies form behind rocks or along river bends. These circular currents trap food and give trout a low-effort feeding lane.

Eddies are excellent targets when nymphing or fishing small dry flies.

Reading Water on Estes Park Fly Fishing Waters

Big Thompson River Fly Fishing

• Look for pocket water and seams through town

• Below Lake Estes, focus on deeper runs and structure

• Accuracy and drag-free drifts matter more than long casts

Fall River Fly Fishing

• Pocket water dominates inside Rocky Mountain National Park

• Fish soft water behind rocks and along edges

• Short drifts and precise presentations are key

Fly Fishing Alpine Lakes Near Estes Park

• Early and late: trout cruise near shorelines

• Midday: fish move deeper toward drop-offs

• Watch for wind lanes and insect activity

How Seasons Affect Where Trout Hold

• Spring runoff: Trout move to slower edges

• Summer: Riffles, seams, and shaded banks are prime

• Fall: Fish hold near deeper water and spawning areas

• Winter: Slow, deep runs and tailouts become critical

Understanding seasonal movement helps eliminate unproductive water quickly.

Simple Drill to Improve Your Water Reading Skills

Before making a cast:

1. Pause and observe the river

2. Identify three likely holding spots

3. Fish each thoroughly

4. Move if no response

This builds confidence and trains your eye to recognize trout water faster.

Matching Your Fly Fishing Setup to the Water

• Fast water: Weighted nymphs and shorter drifts

• Seams and runs: Indicator or tight-line nymphing

• Pools: Longer leaders and lighter tippet

• Dry fly water: Focus on drag-free presentations

Final Thoughts on Reading Water for Fly Fishing

Learning how to read water is one of the fastest ways to improve your fly fishing success in Estes Park. When you understand where trout hold, every cast becomes more intentional — and far more effective.

If you want to shorten the learning curve, fishing with a local guide can make a huge difference. Our guides spend hundreds of days each year fly fishing Estes Park waters and are happy to help anglers of all skill levels learn how to find fish on their own.

Tight lines, and we’ll see you on the river.

November brings low, ultra-clear water and cautious, winter-mode trout. This post teaches anglers how to succeed in the cold season — focusing on sight-fishing, subtle presentations, and tailwater strategy.

1. What Changes in November

• Water temperatures drop into winter ranges

• Trout concentrate in deeper runs and slow glides

• Midges become the primary food source

• Alpine lakes begin freezing — river stretches become the prime option

2. Best November Waters

• Big Thompson (Below Lake Estes): Consistent flows and reliable winter productivity

• Lower Meadow Sections of RMNP: Still accessible before heavier snow arrives

• Pocketwater near Drake: Deep slots holding fish seeking stable temperatures

3. Trout Behavior in November

• More subtle, energy-conserving takes

• Fish holding deeper or in slower water

• Increased reliance on tiny midges, emergers, and soft hackles

• Best feeding windows during warm midday periods

4. November Fly Box

• Zebra Midges (#18–24)

• RS2s (gray, black)

• Flashback PTs (#16–20)

• Soft Hackle PT

• Winter worms (pink/red)

• Small BWO dries on calm days

5. Cold-Season Tips

• Use 5x–6x tippet and small indicators

• Approach slowly — fish are spooky in ultra-clear water

• Fish between 11am and 3pm for your best chances

• Dress warmly and bring gloves or hand warmers

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November fly fishing demands precision, and it is one of the best months to learn subtle winter techniques from an experienced guide.
Book a November guided trip with Fly Fish Estes Park and enjoy quiet rivers, crisp mountain air, and trout that still feed readily when approached correctly.
Reserve your late-fall adventure before winter fully settles in.

October brings golden aspens, crisp mornings, and trout feeding aggressively before winter. This post highlights why October is one of the most underrated months to fish the Estes Park area, focusing on changing conditions, insect activity, and the ideal waters to target.

1. Why October Is a Hidden Gem

• Fewer crowds in RMNP and the Big Thompson

• Cooler water means more active trout

• Stunning fall colors and elk rut season enhance the experience

2. Where to Fish

• Big Thompson River (Below Lake Estes): Reliable flows, clear water, predictable fish movement

• Moraine Park / Horseshoe Park: Meadow stretches with great sight-fishing before temperatures drop

• Select Alpine Lakes: Still open early in October, with trout cruising the shallows

3. Seasonal Trout Behavior

• Increased feeding ahead of winter

• Browns transitioning to pre-spawn patterns

• Higher activity during late-morning to afternoon warmups

4. October Fly Box

• BWOs (#18–22)

• Elk Hair Caddis (#14–18)

• Griffith’s Gnat (#20–24)

• Ants and beetles during warm afternoons

• Pheasant Tails, Frenchies, and WD-40s subsurface

5. Tips for Success

• Fish the warmest hours (10am–3pm)

• Wear layers — mornings can be cold

• Use longer leaders and lighter tippet as water gets clearer

• Take time for photos — the fall scenery is unbeatable

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October is one of the most visually stunning and productive fishing months of the year.
Book your October fly-fishing trip with Fly Fish Estes Park and let our guides put you on active trout, beautiful water, and unmatched fall scenery.
Schedule your guided trip before the season winds down.

5 Reasons Fall is the Best Time to Fly Fish in Rocky Mountain National Park

When the leaves turn gold and the summer crowds fade, Rocky Mountain National Park transforms into a fly fishing paradise. The crisp air, peaceful rivers, and stunning scenery create an atmosphere that every angler should experience at least once. Fall offers a rare combination of solitude and beauty, making it one of the most rewarding times to cast a line.

One of the biggest advantages of fishing in the park during autumn is the quiet. While summer months can be bustling with visitors, fall brings a slower pace, leaving more space along the riverbanks and alpine lakes. This peacefulness allows anglers to focus on their casts and truly soak in the sound of the water and the rustle of the leaves.

The trout themselves are more active this time of year. As water temperatures drop, fish feed aggressively in preparation for the colder months ahead. Brown trout enter their pre-spawn phase and brook trout show off brilliant spawning colors, making them both more willing to take a fly and more spectacular to see up close.

The scenery alone is worth the trip. Golden aspen groves frame snow-dusted peaks under clear blue skies, and the light seems to shift in a way that makes everything look like a painting. It’s the kind of beauty that will have you pausing between casts to take it all in.

For anglers who love surface action, fall can still deliver. Late-season hatches of Blue-Winged Olives and midges tempt trout to rise, offering perfect opportunities for a carefully presented dry fly. On calm afternoons, the surface comes alive with subtle rises that make for exciting, technical fishing.

Wildlife encounters add another layer of magic to fall fishing in the Rockies. The bugling of elk echoes through the valleys, hawks circle overhead, and the occasional moose may wander near the water’s edge. It’s a reminder that in this season, you’re sharing the river with some of the park’s most iconic residents.

If you go, remember to dress in layers and bring a thermos. Fall mornings can be brisk, but the reward is a day filled with trout, quiet waters, and unforgettable views. Whether you’re a seasoned angler or new to the sport, there’s no better time to experience Rocky Mountain National Park. Book your guided trip with Fly Fish Estes Park this fall, and let us show you the season’s best fishing spots before the snow arrives.

What to Expect—and Ask—on a Walking and Wading Guided Fly Fishing Trip

A walking and wading guided fly fishing trip is an immersive experience for anglers who want to connect more deeply with the water, the fish, and the surrounding landscape. Unlike float trips, you’ll be on foot, hiking into the river and wading through prime fishing spots. Whether you’re a beginner looking to learn the basics or a seasoned angler aiming to improve your skills, this type of trip offers personalized instruction and a more hands-on approach. But to make the most of it, it’s important to come prepared—not just with gear, but with the right questions.

Before booking, ask your outfitter about the difficulty level of the trip. How strenuous is the hiking and wading? Some rivers require navigating slippery rocks or walking long distances, so it’s key to match the trip to your fitness level. What gear is included in the trip, and what should I bring? Most outfitters provide rods, reels, flies, and waders, but confirming in advance will ensure you’re properly outfitted. It’s also helpful to ask, What’s the fishing like this time of year? so you can set realistic expectations about conditions and catch opportunities.

Once you meet your guide, don’t hesitate to ask more detailed questions: What flies are working right now and why? What techniques should I focus on today? Guides love sharing knowledge, and these questions open the door to a more educational and rewarding day. If you’re new to fly fishing or want to improve your casting, be upfront—Can we spend time focusing on technique? Good guides will tailor the day to your goals and skill level.

On the water, expect to move between various fish-holding areas—riffles, pools, and undercut banks—while learning how to read the river and present your fly naturally. You’ll spend most of the day standing in or near moving water, so sturdy wading boots and layered clothing are a must. Be sure to ask your guide about river etiquette and local conservation efforts—it’s a great way to connect with the area and become a more responsible angler.

Most importantly, remember to clearly express your goals for the trip. Whether you’re looking for an easy-access day on a well-traveled stream or an adventurous off-trail experience in remote water, sharing your preferences upfront helps your guide plan the best day possible for you. A little communication goes a long way in turning a day on the river into the perfect fly fishing adventure.

Planning your first fly fishing trip can be both exciting and a little overwhelming, but a few simple tips can set you up for success. Start by choosing a beginner-friendly location with accessible water and a healthy fish population—local ponds, small streams, or well-stocked rivers are great options. Focus on mastering a few basic casts and bring along a simple fly selection like midges, woolly buggers, and parachute adams. Keep your rigging straightforward, be patient with yourself, and don’t worry about perfection—fish respond more to good presentation than flawless form. Most importantly, slow down, observe the water, and enjoy the experience—fly fishing is as much about connection with nature as it is about catching fish.