Winter Fly Fishing on the Arkansas River near Pueblo, Colorado: Tips and Tricks for an Ideal Late Season Destination

As the days shorten and the temperatures drop, many fly fishermen begin to hang up their rods for the season. But for those in the know, winter can offer some of the best fishing of the year—especially along the Arkansas River in Pueblo, Colorado. Known for its excellent year-round fishery, the “Ark” (particularly the tailwater section below Pueblo Reservoir) offers an underrated winter angling experience that rewards those who are
willing to venture out.

5280 Angler guides Tom Caprio and Jeremy Hamilton recently presented a tips & tricks show to a live audience at the Orvis Park Meadows retail shop. Read on to find out why Pueblo is such a great winter fishery, and how to make the most out of the resource.

Why Fish the Arkansas River in Winter?
Winter fly fishing in Pueblo is unique due to the river’s mild winter conditions compared to other (higher altitude) parts of Colorado. The Arkansas River below Pueblo Reservoir is fed by water from the reservoir, which helps maintain a relatively stable water temperature throughout the cold months. This makes it one of the few places where you can consistently fish throughout the winter without worrying about ice or extreme cold weather conditions that affect other rivers. Fishing the Arkansas in Lake Pueblo State Park offers the chance to enjoy a surprisingly scenic trout fishery within a short distance of an urban area. The colder water slows fish metabolism, making them less active, but those that are feeding tend to be more opportunistic when it comes to flies. Plus, the river offers a mix of wild browns, rainbows, and suckers, as well as rainbows and cutbows stocked by the nearby fish hatchery run by the state.

Winter Entomology and Fly Selection
Understanding the timing of hatches and the water temperatures at which insects emerge is crucial for successful winter fly fishing. While winter conditions slow down insect activity, you can still target certain hatches that occur in response to changing water temperatures.

Midges: These tiny insects are by far the most common hatch during winter months. Midges can hatch in water temperatures as low as 34°F to 38°F, making them highly active even during the coldest months. They are a staple food source for trout in winter, and when fish are keyed in on midges, you’ll see them rising more frequently. Midge pupae and adults are important flies to have in your box, especially in the #18 to #24 range, as they match the size of the natural midges in the Arkansas River.

Baetis Mayflies (BWO): Baetis, or Blue-Winged Olives, typically begin hatching when water temperatures reach around 42°F to 48°F, making them one of the first mayflies to hatch in early spring and often a reliable winter hatch as well. These mayflies are most active in the late winter and early spring, especially on warmer days when water temperatures creep higher. Their hatches can produce excellent dry fly fishing opportunities, especially when conditions are just right. If you catch it, the river comes alive with rising trout, even on some December and
January days!

Caddisflies: Caddisflies are not as common during winter as midges and mayflies but can still provide action when the water temperature rises into the 45°F to 50°F range. Caddis generally hatch in spring and summer, but some species emerge during milder winter days when the water is slightly warmer. Our guides recently observed caddis on a late November afternoon. These hatches often occur during the late afternoon and are typically triggered by a combination of water temperature and light levels. In winter, targeting Caddis larva or Caddis pupa patterns can be effective, even if you don’t see adults hatching on the surface.

Fly Fishing Inside Lake Pueblo State Park
Lake Pueblo State Park offers a great winter fly fishing experience just below the reservoir. The lake itself is a warm-water fishery, but the area below the Pueblo Reservoir tailwaters provides unique opportunities. Winter Fishing at Lake Pueblo SP is perfect for anglers looking to diversify their experience with different types of fly fishing. The tailwater area below the dam is a cold-water fishery where anglers can target a variety of species, including rainbow trout, brown trout, and occasionally, even walleye. During the winter, fish tend to congregate near deeper water, especially in slower-moving areas close to the shoreline and dam release points.

Fly Fishing for Trout: Winter trout fishing here is primarily nymphing-focused, but streamers can also work. Consider using various mayfly nymphs/emergers such as Darth Baetis, Juju Baetis, Radiation Baetis or similar style patterns. Additionally, egg patterns in this area, especially during late fall through winter when trout are most active around spawning periods. Be sure to “mind the redd” and step/fish carefully during such periods. Worm and leech patterns are also highly effective on most days.

Fly Fishing for Walleye: While a bit more challenging, walleye can also be found below the dam in the winter months. Though walleye are primarily a warm-water species, they can be caught by targeting deeper areas with larger streamers, such as Clouser Minnows. Use long, slow retrieves, especially in the colder months when walleye are more lethargic.

Winter Fishing Conditions at Lake Pueblo State Park
Water Conditions: The tailwater below Pueblo Reservoir remains colder than the lake itself, but it’s more manageable for winter fishing than many other Colorado rivers. The water stays at around 40°F to 45°F, making it a more accessible winter fishing destination. The tailwater also tends to have relatively stable flows during the winter months, reducing the likelihood of fluctuating water conditions.

Weather and Accessibility: The reservoir and tailwater area can be quite windy during the winter, so be prepared for cold gusts. However, snow is usually light and doesn’t affect accessibility, making it easier to get to the river and fish without worrying about weather-related closures. The trail systems along the river also provide excellent access, and most of the river remains in the sun during the day.

Fishing Tactics: When fishing the tailwater, focus on deep runs, dishes, pools, slow-moving eddies, and slots around the various stream improvements. Winter fishing requires a slower presentation, so generally take your time, adjust your weight as needed, and ensure your flies are down in the feeding zone.

Winter Fly Fishing Techniques
When it comes to winter fly fishing, patience and precision are paramount. Here are some techniques and fly patterns to consider:

Nymphing: With fish less likely to chase fast-moving prey, nymphs are the go-tob fly pattern in winter. Focus on smaller, more natural-looking patterns, such as pheasant tails, midges, and natural looking worms/leeches. In the winter months, Darth Baetis (a darker variant of the classic BWO pattern) is particularly effective, as it mimics the baetis mayfly, which is a common winter hatch. Fish often hover near the bottom during winter, so deep nymphing with an indicator or euro- nymphing is your best bet. You’ll also want to try egg patterns. A well-presented Egg pattern—in shades of orange, pink, or red—can be highly effective during certain periods.

Streamers: While fish are slower in winter, streamers can still produce results, especially when targeting larger fish. Use small to medium-sized streamers in natural colors like olive, brown, or black to mimic sculpins and other baitfish. Leeches are another great winter streamer choice—these dark, slow-moving flies mimic the aquatic leeches that trout feed on during the colder months. Working them slowly and deliberately through deeper runs or near structure can provoke a strike from a more aggressive fish.

Dry Fly Fishing: While not as common in winter, dry fly fishing can still be productive, especially on warmer days when insect hatches occur. Midges are the most frequent winter hatches, and a small, well-presented midge pattern on the surface may attract trout, particularly in slower pools. Parachute adams or similar mayfly patterns also work well when fish are rising. Orvis carries all the flies needed for a successful day on the Arkansas River.

Gear Considerations for Winter Fishing
Winter fishing requires a slightly different gear setup to keep you comfortable and effective on the water. The Orvis shops at Park Meadows or Cherry Creek have all the gear needed to make a winter’s day on the river comfortable and productive.

Rods and Reels: A 9-foot, 4-weight to 6-weight rod is perfect for winter fishing on the Arkansas. It’s light enough for sensitive presentations but sturdy enough to handle larger fish. Choose a reel with a reliable drag system in case you hook into a big one. (Sidenote- be sure to keep your reel as dry as possible during winter months to prevent ice buildup). Some anglers enjoy a euro-setup on the “Ark” as well.
Clothing: Cold-weather clothing is essential. Start with moisture-wicking layers to keep sweat off your skin, followed by insulating layers like fleece or down for warmth. Merino wool socks or similar are also essential. A waterproof, breathable jacket is crucial to protect against wind and snow, and don’t forget a good pair of
gloves (or two) with fingers exposed for tying knots.
Accessories: Keep your gear functional by using a hand warmer for your casting hand, and always have extra tippet and leaders on hand. A hand towel is also an extremely helpful piece of gear (for drying your hands off after landing the big one). It’s also a good idea to carry a thermos of hot coffee/tea and some snacks to stay warm while taking a break.

Winter Fly Fishing Tips for Success

Chase the sun: Those rays may be just what it takes to trigger a hatch and activate the feeding behavior of the fish. Not to mention, you’ll stay warmer fishing in the sunshine also!
Fish Slow and Deep: Because of the cold-water temperatures, trout won’t be as aggressive. Slow down your casts, and make sure your flies sink to the bottom. Focus on deep pools, runs, and undercut banks where fish may be holding.
Observe the Water: Pay attention to insect activity. On warmer days, you might see a hatch of midges or other small insects, which can provide a window of opportunity for dry fly fishing. Watch for rising fish and adjust your tactics accordingly.
Practice Patience: Winter fishing requires a calm demeanor and a patient attitude. The bite may not be as fast as during the warmer months, but the reward is often a quiet, scenic day on the river with fewer anglers and the chance to catch some trophy fish.

Why fish Pueblo with 5280 Angler?
If you’re looking to make the most of your winter fly fishing adventure, consider booking a guided trip with our Orvis endorsed team. Take advantage of special winter rates from November through March on our guided trips! Whether you’rea seasoned angler or new to winter fishing, our guides know the nuances of the river, and are happy to help anglers of every experience level. If you’re unfamiliar with the area or want to improve your winter fishing techniques, a day on the water with a guide can help you develop skills, learn about the river’s
seasonal patterns, and discover new tactics that can make a difference. 5280 Angler is
one of the few fortunate outfitters to operate with a special use permit from Lake Pueblo
State Park!

To book a winter trip with one of our guides, please CONTACT US and we’ll be happy to set it up!