Good morning, anglers, this is Artificial Lure with your April 18th, 2025, Colorado River fishing report.
Spring is rolling along the Colorado, and conditions are shaping up nicely for a top-notch day on the water. Flows below Glenwood Springs are up, currently around 2500 CFS, and rising due to spring melt. Expect clear water on cool nights, but a brown tinge if we’ve had a run of warm afternoons. Water temps are hovering around 47 degrees, with mid-morning air warming up into the low 50s. Skies are mostly clear, sunrise hit at 6:27 a.m. and you’ll have daylight until about 7:45 p.m.
Fishing activity has picked up in the last week, especially through the middle and lower stretches. Both wade and float anglers are reporting solid action, with the best bite running late morning through mid-afternoon as water temperatures rise and insect hatches intensify. Keep in mind, certain spawning closures remain in effect at Grizzly, Canyon, Castle, and Elk Creeks—signs are posted, so respect those off-limits areas.
Trout are the main stars right now, with hefty browns and rainbows being caught, especially between Glenwood Springs and Rifle. The Upper Colorado near Kremmling is delivering good numbers of rainbows and the occasional big brown, particularly in slower seams and deep runs. Anglers have also spotted the rare Colorado River cutthroat and, in the lower sections, even a few endangered Colorado pikeminnows recently turned up by survey crews—not a target, but a sign the river is healthy and diverse.
Hatch-wise, blue wing olives and midges are thick, with an early pulse of caddis and a few stoneflies showing up as well. Best patterns for nymphing include Pat’s Rubber Legs, beadhead pheasant tails, RS2s, zebra midges, and Prince nymphs in sizes 16–20. For dries, Parachute Adams, BWO comparaduns, and Griffith’s Gnats sized 18–22 will get looks when fish are rising, particularly on cloudy afternoons. The streamer bite is strong on overcast days or early and late—think Thin Mints, Sex Dungeons, and olive Slump Busters stripped deep along cutbanks and structure.
As for bait, artificial lures and flies are the ticket here, particularly as regulations restrict use of bait in many stretches. Stick to artificial flies and lures to stay legal and ethical.
Top hot spots today:
- The confluence of the Roaring Fork and Colorado at Two Rivers Park in Glenwood Springs has been a local favorite, offering easy access and good riffles.
- Grizzly Creek Access is less crowded and delivers strong nymphing action in pocket water.
- South Canyon Recreation Area and the riffles near New Castle hold big fish and see a bit less pressure.
Remember, handle those spawning rainbows gently and give them space. With flows rising and bugs hatching, today’s the day to string up the rod and chase some feisty Colorado River trout. Tight lines from Artificial Lure, and I’ll see you on the water.