Aspen Outfitting Company’s Upper Roaring Fork River Report 4/21/23

Cian McGillicuddyFly Fishing, Fly FishingLeave a Comment

Flows and Water Clarity

Water levels on the Roaring Fork have dropped with the recent cold weather. Flows are 133 cfs below Maroon Creek and 352 cfs at Emma. Water clarity has improved significantly since last week.


After increased flows and decreased visibility last week, flows have settled back down and the water has cleared up with this colder weather! Colder temps this week should keep these conditions stable. That means some of the bigger bugs that were working last week are still in play, but smaller midge and baetis patterns are back on the menu!

Big stoneflies (Pat’s Rubber Legs, Prince Nymphs, 20 Inchers), worms and larger generalist patterns (Pheasant tails, Hare’s Ears, Jig-style file) have all been working, but Stonefly patterns have been our top producer! Midges and BWOs are definitely still present in the system, so trailing midge or baetis patterns is still a good option, particularly in deeper, slower runs. 

Don’t forget that streamers are also on the menu! With the water clearing up and temps back in the high thirties and low forties, try smaller streamers and slower retrieves. For more information on Spring Streamer Fishing, click here

We continue to be on the lookout for spawning activity, if you see anything please let us know as we want to make sure we’re helping local anglers stay off of redds. Avoid wading through shallow tail outs as that’s where redds are most likely to be. Read more below.

PSA The Rainbow Trout Spawn

We know that for the most part the fly fishing community is educated and thoughtful about responsible use of the resource and protecting future generations of fish, but we think that it is still worth reminding everyone to be mindful of spawning fish as we move into spring.

Trout create spawning beds or “Redds,” which are generally found in shallow, moving water. Identifying these redds is an important skill as an angler and helps us fish ethically. Redds are generally composed of smaller rocks and gravel that are lighter in color than the rest of the river bottom due to spawning fish brushing the rocks as they mate and clearing them of algae and other organic material. These beds provide safety for the eggs and alveins (fry) that are a result of the spawn and the next generation of fish!

Stay away from redds, fish deeper water where trout are actively feeding, and use good fish handling practices. If you are hitting the water with someone who is new to the sport, please use this time of year as an opportunity to share how to fish ethically and be a steward of the resource. To learn more about fishing during the spring spawn, click here and share!

Common Hatches and Food Sources 

Stoneflies, Worms, Caddis and BWOs

Though midges and BWO’s are still present (and will catch fish), we’re switching over to bigger flies like stones, worms and caddis with the increased flows and decreased visibility. Smaller stonefly patterns (size 14-18) that were productive earlier in the spring are still definitely working, but larger bugs (size 8-12) are working now too. If you can fish big, why wouldn’t you! We still aren’t really seeing caddis hatching on the upper fork, but fish are occasionally eating them sub-surface.

Hot flies & Techniques


Point Flies

Hot Flies: Pat’s Rubber Legs/Girdle Bug (size black, coffee, brown 6-14), 20 incher (size 8-14, natural), Prince Nymph (size 8-16), Squirmy or San Juan Worm (Tan, Pink, Blood Worm), Guide’s Choice Hare’s ear (size 12-16), Frenchie Style flies (12-16), Perdigon (pearl, size 16).

Tungsten jigs with hot collars (yellow, brown, pink, size 12-16), Eggs (chartreuse, peach, white). Pheasant Tails (black, natural, flashback 12-16). 

Midges and Baetis 

Hot Flies: Sparklewing RS2 (black, size 16), Chocolate Thunder (black, size 16), 

Epoxy Midge (Red, size 16-18), WD40 (black, gray, size 16-18), Miracle Midge (gray, brown, size 16-18) RS2’s (cdc, crystal wing, black, gray, size 18-22), crystal midge (gray, olive, size 20-22), Juju Baetis (red, olive, black size 18-22), Pheasant Tail (natural 18-20).


Hot Flies: Griffith’s gnat (classic or hi-vis, 18-22)

Element Hi-Vis Midge (black, size 20) Parachute Adams (18-20), BWO Hackle Stacker (18-20)


Mini Dungeons (black, white, natural (size 8), Mini D&D (purple, olive size 6), Motor Oil (black, size 6), Slumpbuster (natural, size 8-12), Thin Mint (size 6-10). 


Nymphing is the most productive technique during this time of year. Finding deep holding water and using weight to get your flies down will be crucial to success. Longer leaders and heavy split shot will help you get your flies in front of more fish. Leading with larger jig style or tungsten patterns has been a very productive technique for helping smaller flies get down deeper. 

Decreased visibility during runoff provides us the opportunity to fish larger, flashier flies and use heavier tippet. Adjust size, flash and tippet selection depending on the water clarity where you’re fishing. As water levels continue to rise, fish will get pushed into pockets and eddies closer to the bank, but if whitewater isn’t ripping through your favorite holes yet, there are still fish hanging out there, 

Dry fly hatches are beginning to increase in frequency, so keep an eye out for pods of rising fish. Spring dry fly hatches can be sporadic compared to the summer months, but are incredibly fun and rewarding to fish. Midges, BWO’s and Caddis are all common spring hatches. 

As we move into spring, streamers will become important in your rotation! Small streamers tend to be best during early spring, and be sure to focus your efforts on deep pools and structure. 

Information About The Roaring Fork

The Roaring Fork River is a freestone river that runs 70 miles from Independence Pass through Aspen, Basalt, and Carbondale until it reaches its confluence with the Colorado River in Glenwood Springs. The cold, clean waters of this famous river support an incredible array of aquatic life including brown, rainbow and cutthroat trout. The Roaring Fork is designated as a “Gold Medal” fishery, meaning it offers some of the best trout fishing in the nation to beginners and seasoned anglers alike.

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