Winter in Colorado isn’t just for skiers. For anglers willing to layer up and think differently, it’s also a surprisingly productive time to fly fish. While the conditions are colder and the fish are more sluggish, fewer crowds and crystal-clear water make for rewarding days on the water, especially when you’re armed with the right knowledge, gear, and expectations.
This guide covers everything you need to know about winter fly fishing in Colorado, including safety, fly selection, gear tips, and when and where to go.
Book a Guided Trip with Elk Mountain Expeditions to make the most of your winter on the water.
Can You Fly Fish in Colorado in the Winter?
Yes, and it can be excellent. The key is choosing the right river systems and knowing how trout behavior changes in cold temperatures.
- Low elevation streams with warmer water temps are best
- Fish are less active, so slower presentations are key
- Midday is typically the most productive window (11 a.m.–3 p.m.)
- Crowds are minimal, and water clarity is high
What to Expect from Winter Trout Behavior
Trout are cold-blooded, and their metabolism slows in winter. Expect:
- Fewer but more deliberate takes
- Deeper holding positions near slower current
- Best feeding windows during warmer parts of the day
- Nymphing to outperform dry fly or streamer fishing in most cases
- Ice Shelves that form on the banks can be an attractive structure for trout
- Areas with good sun exposure throughout the day tend to be more productive
This shift means anglers need to slow everything down and stay stealthy. Success is about patience and precision.
Winter Fly Selection: Go Small and Subtle
The bugs are still there, you just have to match the hatch with more finesse. Top winter fly patterns include:
Best Winter Nymphs
- Midges (Zebra Midge, Black Beauty) – size 18–24
- Baetis/Blue-Winged Olive nymphs – size 18–22
- Egg patterns and beads – size 14–16
- Leeches and worms- especially when the weather turns warmer, and the water gets slightly off color
Winter Dry Flies
- Griffith’s Gnat, BWO, Midge Clusters – when midges hatch mid-afternoon
Check local hatch reports to match the food source. Presentation trumps variety: a well-drifted Zebra Midge will outperform any flashy attractor in winter.
Essential Winter Fly Fishing Gear
Staying warm and safe is key to an enjoyable day on the water.
Must-Have Cold Weather Gear:
- Layered clothing: Merino wool base, insulating mid-layer, and waterproof shell
- Winter fly fishing gloves: Look for fingerless or convertible gloves (simms, kast)
- Warm hat and neck gaiter
- Good waders and thick wool socks
- Hand warmers and dry towels in your pack
- Thermos with warm drink for morale and blood flow
Also, bring a thermometer: water temps below 38°F signal extra sluggish fish.
Where to Fly Fish in Colorado During Winter
Some Colorado rivers stay fishable and productive throughout the winter due to tailwaters, springs, or unique geography. Some top general areas:
- Fryingpan River – Crystal-clear tailwater with consistent flows, due to dam runoff
- South Platte River (Deckers, Dream Stream) – Consistent tailwater flows and legendary winter fishing
- Roaring Fork River – Reliable fishing sections from Aspen to Glenwood Springs
- Lower Colorado River – The Colorado below Glenwood Springs is lower elevation than most trout streams in the state and can produce huge trout.
- Yampa River (below Stagecoach) – Spring-fed and productive with midges/BWO
- Arkansas River near Salida – Warmer stretches may produce on sunny days
Look for lower-elevation rivers with regulated dam releases and ice-free edges.
Safety and Access Tips
Winter fishing isn’t about racking up numbers; it’s about smart planning, conservation, and knowing your limits.
- Use barbless hooks and land fish quickly to reduce stress in cold water
- Be cautious on snowy/icy riverbanks
- Avoid fishing below ice dams during a warming trend as they can break, causing a sudden surge in flow
- Don’t wade aggressively; slipping can be dangerous in freezing water
- Let someone know your location if fishing solo
- Keep fish in the water during releases; cold air temps can freeze gills
Want a guide who knows the ins and outs of winter rivers? Book a guided trip and let a local expert show you where and how to fish smartly in the cold.
Ready to Fish?
Winter fly fishing offers quiet solitude, technical challenges, and surprisingly productive days for those willing to brave the cold. With the right flies, gear, and local knowledge, winter can quickly become your favorite fly fishing season.
Explore Guided Winter Trips with Elk Mountain Expeditions
FAQ: Winter Fly Fishing in Colorado
Can you fly fish in Colorado in the winter?
Yes. Look for tailwaters and spring-fed rivers like the Fryingpan or South Platte for the best conditions.
Is fly fishing good in the winter?
Yes, especially for anglers who appreciate solitude, technical presentations, and picky trout.
What are the best flies for winter fly fishing?
Midges, BWOs, and egg patterns are winter staples. Go small, subtle, and precise.
What gear do I need for winter fly fishing?
Layered clothing, gloves, and good waders are essential. Bring hand warmers and stay dry.
Can you catch trout in Colorado year-round?
Yes. Colorado has year-round trout fisheries, especially in regulated tailwater sections.
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