RIVER REPORT
Colorado River | Kremmling
As the Colorado River flows through Kremmling, it offers anglers a picturesque and productive stretch of water surrounded by stunning high-country landscapes. This section is known for its diverse fishing opportunities, with healthy populations of brown and rainbow trout thriving in the cold, nutrient-rich waters. The river here features a mix of fast riffles, deep runs, and slower pools, making it ideal for various fishing techniques such as nymphing, dry fly, and streamer fishing. The confluence with the Blue River further enhances this section’s appeal, providing cool water and an influx of food sources. Hatches of blue-winged olives, caddisflies, and stoneflies are common, especially in the warmer months, creating excellent conditions for anglers. The easy access and the dramatic scenery of the surrounding mountains make Kremmling a favored spot for those looking to experience the beauty and bounty of the Colorado River.
CONDITIONS
Weather & Flow Data Reported From OpenWeather and USGS
Recent Reports
Colorado River near Kremmling – April Fly Fishing Report: As of early April, the Colorado River near Kremmling is exhibiting favorable fishing conditions. Recent reports indicate that flows are steady, providing excellent opportunities for both wade and float anglers. Water temperatures are in the 40s°F, which has stimulated increased trout activity. Anglers are observing consistent midday hatches of midges and blue-winged olives (BWOs), leading to productive nymphing and occasional dry fly opportunities. Effective fly patterns include Pat’s Rubber Legs in black, brown, or olive (sizes 10–14), Tungsten Flashback Pheasant Tail (sizes 14–20), and Sparkle Wing RS2 in grey or olive (sizes 18–22). Additionally, streamer fishing can be productive, with patterns like Baby Gonga in brown trout colors and Slump Busters in olive or black (sizes 4–6) yielding positive results. With the anticipated onset of the Mother’s Day caddis hatch later this month, anglers should be prepared for increased surface activity. Overall, the Kremmling stretch of the Colorado River offers promising opportunities for anglers this April.
Water Flow Data
5 Day Outlook
BUGS
Colorado River’s insect life provides a smorgasbord for hungry trout. AvidMax recommends these key fly patterns:
THE FISHERY
The Colorado River at Kremmling provides anglers with access to diverse trout waters, where the combination of riffles, deep pools, and stunning canyon scenery creates an exceptional fishing experience.
Fish Species
The Colorado River near Kremmling is home to thriving populations of brown and rainbow trout, with browns being the dominant species. Trout in this section often range from 12-20 inches, with opportunities for larger fish, especially during the fall when brown trout are more aggressive as they prepare for spawning.
Unique Fishing Conditions
This section of the Colorado River offers diverse water conditions, including riffles, deep runs, and slower pools, making it suitable for various fishing techniques. Summer and fall are the best times for fly fishing, with dry fly action peaking during caddis and blue-winged olive hatches. Nymphing with small midges, mayflies, and stonefly patterns (sizes 16-22) is effective year-round, while streamers are especially productive in the fall for targeting larger brown trout. The water clarity and depth make this a great spot for both wading and float fishing.
Access and Regulations
Public access is available through several spots near Kremmling, including the Radium and Pumphouse Recreation Areas, which are popular for wading and floating. This section is managed as Gold Medal Waters, meaning it is regulated for trophy trout, and artificial flies and lures are required. Anglers should practice catch-and-release to help preserve the fishery, especially during the spawning season. Water flows can vary depending on upstream releases, so checking conditions before heading out is recommended.
TACTICS
AvidMax encourages anglers to explore their full repertoire on the Colorado River:
Nymphing
Nymphing allows anglers to target trout feeding below the surface, with or without an indicator, making it an effective technique for covering deep runs and slow pools where fish are actively feeding on subsurface insects.
Dry Fly Fishing
Fishing with dry flies provides the ultimate surface experience, imitating adult insects and offering exciting visual strikes, particularly during hatches when trout are feeding on the water’s surface.
Streamer Fishing
Using streamers mimics baitfish and other larger prey, offering an aggressive approach that can entice bigger, predatory trout, especially when fishing deeper water or fast-moving currents.

SEASONS
Each season on the Colorado River brings unique joys and challenges for AvidMax anglers:
Spring
Spring runoff can raise water levels, making nymphing with stonefly and baetis patterns effective in slower water near the banks. Focus on eddies and deeper pools where trout find refuge from faster currents.
Summer
Summer provides excellent dry fly fishing with strong hatches of caddis, PMDs, and terrestrials like hoppers. Early morning and late evening are the best times for surface action in riffles and along the banks.
Fall
Fall is prime time for targeting large brown trout as they prepare to spawn, making streamers and egg patterns highly effective. Fish deeper pools and structure for the best chance at catching aggressive, trophy-sized trout.
Winter
Winter fishing can still be productive, especially in slower, deeper runs where trout hold during colder months. Nymphing with small midge and baetis patterns is most effective during the warmest part of the day.

REMEMBER
The Colorado River at Kremmling offers anglers a diverse and scenic fishing experience, with opportunities to target large trout in both riffles and deeper pools. However, the river’s popularity and dynamic conditions mean that responsible fishing and careful attention to safety are essential for preserving this iconic fishery.
Water Conditions
Flows can vary significantly depending on dam releases and seasonal runoff, especially during spring. Always check the current water levels before heading out, as high flows can impact both fishing success and wading safety.
Regulations
Portions of the Colorado River near Kremmling are subject to catch-and-release regulations and tackle restrictions, such as artificial flies and lures only. Review these regulations to help maintain the fishery’s health and comply with local rules.
Safety
The river’s rocky bottom and swift currents, especially in high water, can make wading tricky. Wear proper wading boots with good traction, and be cautious when navigating deeper pools and faster-moving sections of the river.

COMMENTS
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