Stream Reports
April 19, 2026

General Comments
Our low snowpack means we will have a short runoff that will end earlier then usual.If you're a small steam angler, get out there soon. Bigger rivers like the Colorado, Arkansas, Gunnison, and Roaring Fork will probably fish pretty well through mid-summer. Tailwaters, wher flows can be managed for fish health as well as irrigation and downstream calls may provide reasonalble fishing through the summer. You can check river and creek flows from our home page Real Time Flows link, or by clicking the river names in the table below. We should probably be thinking about stillwater fishing, both locally and in high altitude lakes.

A note on bugs, hatches and fly selection:
While certain insects are actively hatching at certain times as we note below, the larval forms of all insects are always available in the stream. There may be several age classes of stoneflies, for example, at any given time; there are usually several types of caddis in most streams that hatch at different times, and trout will eat them any time they find them- same with mayflies; midges hatch almost every day, so you'll find a mix of larvae, pupae and adults almost all the time. The point we're making is that you don't always have to use a "match the hatch" approach. If bugs aren't hatching, or if your PMD imitation isn't working in July when the bugs are on the water, try a different pattern that imitates something else that lives in that stream or lake. The bugs are there, and the fish are eating them!

Give us a call before heading out as we may have some info based on what we have heard from customers and our own trips.

Click the links in the River and Flows column to access the up to date flow info.

Current streamflow conditions are available for these and other streams at the
Colorado Division of Water Resources.


River and Flows Hatches/Activity Comments Go To Flies
Big Thompson
Above Lake Estes
Below Lake Estes
Midges and BWOs in the Olympus dam tailwater.

BWOs and midges are hatching in the canyon. Caddis, stonefly, midge and other mayfly nymphs in the canyon. Caddis should start hatching soon.
Double nymph rigs will work in deeper runs and pools. Use a matching dry or  dry/dropper rig when fish are rising or for searching the water. Dries: BWO dries #18-22, Para Adams #14-16, Chubby Chernobyl #12-16, Parachute Ant #18-20, Amys Ant #14-16, Midge dries and emergers #18-24
Nymphs: Pink San Juan Worm #16-18, Pheasant Tail Nymphs #18-24, Two-Bit Hookers #16-18, Blue Poison Tung #18-20, Zebra Midge #18-24, Hot Wire Prince Nymph #14-16, 20 Incher Stone #8-12
Streamers:Thin Mint, Wooly Buggers, Platte River Special, Leech patterns.
Rocky Mountain National Park
Moraine Park
Creeks are mostly open but very low.
Sparse BWO and midge hatches Dry/dropper rigs would be our choice Try a double nymph rig in deeper runs. Same as the the Big T
St Vrain
Below Buttonrock Dam

Combined North and South in Lyons

Midges, BWOs are the only hatches. Caddis, stonefly, midge and mayfly nymphs in the canyon and Buttonrock tailwater. Dry/dropper rigs will be most effective. Double nymph rigs should be productive in deeper runs. Same as the the Big T
Cache La Poudre
At canyon mouth BWO and midge hatches. Midge, caddis, stonefly and mayfly nymphs. Dry/dropper rigs will be most effective. Double nymph rigs should be productive in deeper runs. Dries:BWO #18-22, Para Adams #16-24, CDC Baetis Dun #18-22, Black Biot Midge #20-22, Sprout Midge #18-22
Nymphs:Pheasant Tail #18-22, Copper John #18-22, Flashback Scud Olv. #18-20, Sparkle Wing Rs2 #18-22, Jig Baetis #18-20, Brassie #18-22, Bling Midge #20-24, WD-40 #18-22, Two Bit Hooker #16-#18, Copper Rib RS2 #18-22
Streamers:Thin Mint #8-12, Buggers #8, Sparkle Minnow #8, Hot Head Leech #10, Black Wooly Bugger #10,
Blue River
Below Dillon Res. Midges, BWOs, Mysis shrimp. Mysis patterns are a good choice below just below the dam. Otherwise, typical tailwater midges and small mayfly nymph patterns. Streamers can also be effective at times. Dries: Small dries like a Para Adams, Griffith's Gnat and midges. BWO dries.
Nymphs: Barr's Pure Midge, black or gray RS2, Miracle, JuJuBee, Black Beauty, Rainbow Warrior, red midge patterns, Mercury Midge, PT, CJ. Hare's Ear, dark to flashy midge larvae and pupae patterns, Golden Stone nymphs, San Juan Worm, etc. Streamers: Thin Mints, buggers, Pat's Rubber Legs, etc.,
Below Green Mtn Res Midges, BWOs, stonefly, caddis and mayfly nymphs Typical tailwater flies and rigs. Double nymph or dry/dropper rigs. Streamers. Same as Silverthorne except Mysis.
Eagle River
At Avon
At Gypsum.
Midges, BWOs, stonefly, caddis and mayfly nymphs Dry/dropper setups. Attractor nymphs trailed by an RS2, midge or BWO nymph/emerger are good combos. Streamers Dries/Emergers: BWOs, Parachute Adams, RS-2, Griffith's Gnat, Matt's Midge.
Nymphs: Pat's Rubber Legs, Eggs, PT, Micromay, Prince, CJ, San Juan Worms, Midge larvae (Zebra Midge and the like)etc .
Streamers
: Black or olive Slumpbusters, black or olive Buggers, Pine squirrel leeches, Mayer's Mini Leech etc.
Fryingpan
Below Reudi Reservoir. Midges, in the morning. BWOs hatch daily, usually in the early afternoon. Mysis shrimp are often available on the first half mile below Reudi Res. Nymphing morning and late afternoons, dries/emergers during midday to afternoon hatches. Dries: BWO adults and emergers, midge patterns, Stuck in the Shuck midge emergers, #20-24, #22-26 Para Adams, Barr Emerger, Jujubaetis, RS-2, grey or black midge dries down to size 30 or 32, Craven's Mole Fly Nymphs: Green Drake nymphs, olive Gold Ribbed Hares Ear, PT, Midge pupae and larvae, eggs, Rainbow Warrior, Zebra/Black Beauty midges (black or red), Brassies, Eggs, Mysis, pink San Juan Worm . Streamers: Use smaller sizes: Black or olive, Mayer's Mini Leech.
Roaring Fork
Above FP confluence near Basalt
Midges, BWOs, a few caddis. Best fishing is at Jaffe Park and downstream from Basalt. Double or/triple nymph rigs. Dries and dry/dropper rigs Dries:BWO and midge dries: Griffith's Gnat, Sprout midge, EHC and other small caddis dries.
Nymphs: Stonefly, caddis and mayfly nymphs, Pat's Rubber Legs, PT, Copper John, eggs, SJW.
Streamers: Black Bugger, Northern Lights, White Clouser, Pat's Rubber Legs, Mayer's Mini Leech, Pine Squirrel Leech, Mayer's Mini Leaeh.
At Glenwood Springs. Midges, BWOs Same as above. Same as above
Colorado
At Pumphouse

At Parshall

At Glenwood Spgs
Stonefly, caddis and mayfly nymphs. No significant hatches.
Nymphing and streamers. Focus on quiet water and along the banks.
Flows are increasing, and wading may be difficult.
Dries: Stoneflies, midge patterns, Stuck in the Shuck midge emergers, #20-24, #22-26 Para Adams, Barr Emerger, Jujubaetis, RS-2, grey or black midge dries down to size 30 or 32, Elk Hair and other Caddis, Yellow Sallies, Chernobyls/Chubbies. Nymphs: Gold Ribbed Hares Ear, PT, Midge pupae and larvae, eggs, Rainbow Warrior, Zebra/Black Beauty midges (black or red), 20 Incher and other stonefly nymphs, Brassies, Eggs, Mysis, pink San Juan Worm , Pat's Rubber lLgs. Streamers: Use smaller sizes: Black or olive Slumpbusters, black or olive Buggers, etc.
Yampa
Below Stagecoach Res

At Steamboat Springs
Midges, black caddis, BWOs. Nymphing deeper runs and holes amd along the banks in town .
Use typical tailwater patterns and rigs on the Stagecoach tailwater.
Dries: Parachute Adams #16-24, midge dries 20-24, Griffiths Gnat #20-24, RS-2, Barr Emerger #18-22 and other emergers,
Nymphs: Rainbow Warrior #20-22, midge larvae/pupae in black or red #20-26, 20 Incher Stone #10-14, Prince Nymph #12-16, SJWs, Hare's Ear #14-18, Pheasant Tail #14-20,
Streamers: Thin Mint #8-12, Zonker #6-10, Slump Buster #6-10.
Arkansas
Leadville to Buena Vista: At Granite SWA. Caddis, mayfly, midge and stonefly nymphs. Nymphing morning and late aternoon; BWO or midge dries during hatches. Dries:BWOs, Para Adams, Griffith Gnats and Sprout midges
Nymphs: Golden stones, Pheasant Tail, Prince, Hares Ear or Copper John, Zebra Midge, Black Beauty, WD-40 or Top Secret Midge.
Buena Vista to Salida: At Salida.
Caddis, mayfly, midge and stonefly nymphs. Nymphing morning and late aternoon; BWO or midge dries during hatches. BWO hatches have been strong, especially on overcast days. Dries:BWOs, Para Adams, Griffith Gnats and Sporut midges
Nymphs: Golden stones, Pheasant Tail, Prince, Hares Ear or Copper John, Zebra Midge, Black Beauty, WD-40 or Top Secret Midge.
Salida to Canon City: At Canon City. Caddis, mayfly, midge and stonefly nymphs. Nymphing morning and late aternoon; BWO or midge dries during hatches. BWO hatches have been strong, especially on overcast days. Dries:BWOs, Para Adams, Griffith Gnats and Sporut midges
Nymphs: Golden stones, Pheasant Tail, Prince, Hares Ear or Copper John, Zebra Midge, Black Beauty, WD-40 or Top Secret Midge.
At Pueblo Tailwater:

Midges, BWOs. Caddis, mayfly, midge and stonefly nymphs. Typical tailwater patterns Dries: Parachute BWO #20 - 22, Parachute Adams #16-24, Griffiths Gnat #16 - 20,
Nymphs: Mercury Midge #18 - 22, RS II #18 - 22, WD40 #18 - 22, Graphic Cadis #14 - 16, Tabou Caddis # 14 - 16, Hares Ear #8 - 16, San Juan Worm #12 - 16
Streamers: Buggers, Near Nuff Crayfish, Pat's Rubber Legs, Thin Mint
South Platte
At Deckers. Midges, BWOs, Typical tailwater rig and flies. Dries when fish are rising. Dries: Parachute Adams, #22-26 Griffith Gnat #2-24, Matt's Midge #20-24, Parachute Adams #22-24, Barr's Visa Dun #22-24, Blue Dun #20-24, Sparkle Dun #20-24, and Hi Vis Baetis #20-24
Midges:#20-22 Mercury Midge, #22-26 Top Secret Midge, #20-24 Mercury Blood Midge, #20-22 Pearl Jam, #20-22 Brassie, Buckskin #20-22.
Nymphs:Sparkle Wing RS 2 #20-22, Flashback Pheasant Tail #20-22, Chocolate Foam Wing Emergers #20-22, Jujubaetis #20-22, Buckskin #16-18, Graphic Caddis #18, Bead Head Breadcrust #14-18.
Streamers:Olive Crystal Bugger #8-10, White Crystal Bugger #9-10, Pine Squirrel Leech #6-10 (olive, black, rust, and gray), #6-8, Meat Whistle, and Slumpbuste r#6-8 (olive or rust)
Below Cheesman Res. Midges, BWOs, Typical tailwater rig and flies. Dries when fish are rising. Pretty much the same as Deckers.
In Elevenmile Canyon BWOs, midges Typical tailwater rig and flies. Dries when fish are rising. Pretty much the same as Deckers.
At Charlie Meyers State Wildlife Area (Dream Stream). Midges, BWOs Typical tailwater rig and flies. Dries when fish are rising. Pretty much the same as Deckers.
North Platte
At Gray Reef
At Miracle Mile
Grey Reef: 1000 cfs.
Miracle Mile: 2800 cfs
Midges, cranefly larva. orange scuds, black Zebra Midge. We've had some reports of big fish being caught, and fishing is very good. Nymphing almost exclusively. Nymphs: Scuds, Red SJW, Chamois Leech, Hot Wire Prince, Cranefly Larvae. Midges: PAL, Bionic Black/Silver, Bionic Brown, Split Back Trico, Split Foam Back Baetis Red Rock Worm.
Other: Vanilla Buggers, Primrose and Black, Blue Poison Tung, Gray RS2, Eggs