The "tailwater" section of Blue River through Silverthorne fishes fairly consistently year round. Water temps normally stay within the lower forties (fahrenheit), which doesn’t produce a large variety of hatches. For the most part, small midge larva, and Mysis Shrimp (small white shrimp inhabiting Dillon Reservoir), are staples of the trouts diet. Things start to get more interesting if Dillon Reservoir reaches capacity and “spills” through the top release of the dam, instead of the bottom. This causes a larger variety of aquatic insects that live in the Blue River to become active, and therefore more available to trout.
The best technique is usually nymphing under a small, inconspicuous indicator. Adjust your weight and indicator depth depending on the depth of the piece of water you are working, and to the depth at which the fish are holding. Seeing rising fish is a possibility, as is seeing some action on streamers.
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River Flow (Cubic Feet Per Second):
Flows have been near 103 CFS for several weeks, with some of the CFS coming from the Bottom release of Dillon Dam, combined with some mid level release as well.
Water Temperature (degrees F):
mid 40's, slightly warmer than usual due to the mid level release from Dillon.
Crystal clear most of the time, heavy localized precipitation can sometimes cause off color water.
Current Food Sources:
Mysis Shrimp | midges | Baetis | PMDs | caddis | terrestrials | leeches, smaller fish etc
Flies to Try:
Guides Choice Dozen $24.99
Two Bit Hooker size 16-20 dark olive or black | Pheasant Tail natural or black size 16-22 | Thorax emerger BWO sie 20-22 | Poison Tung olive/black size 18 | Split Case PMD size 18 | Bling Midge charcoal or cream size 18-24 | Pure Midge cream | UV Midge black or brown size 18-22 | Mercury Black Beauty size 18-24
| Stimulators | Hippy Stomper yellow size 10-18 | Parachute Adams size 16-24 | Peacock Caddis size 18 | I-Wanne Dun Thorax BWO or PMD | Griffith’s Gnat size 18-24 | Umpqua Adult Midge Dark 20-22 | CDC Morgan's Midge size 20-22
Near Nuff Sculpin olive size 04-06 | Super Bugger Tan size 6 | Pop’s Bugger pearl/grizzly size 8 | Pine Squirrel Leech in black size 12 | Slump Busters in olive and natural | Crystal Bugger white sizes 8-12 | Halebop Leech wine no bead size 8
guide tip of the week:
Dillon Dam is seeing a release of water from both the bottom, and mid level of the reservoir. This means water temps are in the mid to upper 40's, and aqutic insect activity is still strong. We are seeing hatches of small, BWOs, PMDs, and midges with some decent sureface action during the hatches. We are also seeing more caddis larva, cranefly larva, and small stoneflies in the riverbed, so they are also available to trout subsurface. A small double dry fly rig can be effective during the hacth, while a nymph rig with natural imitations of the most prevelant aquatic insects, will be a good choice.
We love seeing and hearing about your outings as well. Send any fishing photos or stories you want to share over to email@example.com and we'll throw 'em up in the reports.
Even though the release from Dillon Reservoir is now from the bottom of the dam with water near 40 degrees, we are still seeing a wider variety of aquatic insects than usual. Here is the most recent sampling of bugs from behind our shop... we are seeing small grey drakes, Baetis, and two different species of free living caddis.
A closer look at a Baetis Nymph, Grey Drake, and free living caddis.
A different species of free living caddis, you can see how much more of a green hue this one has.
We have been seining the Blue behind our shop regulary, and here is the sampling from 7/2/2020. Here we have a good variety of small mayflies including Baetis, drakes, and PMDs, a few tiny leeches, and a larger Cranefly Larva.
6/21/2020 "Fill and spill" started yesterday! You can see water draining into the aptly named "Glory Hole" below. Sun warmed water from the reservoirs surface will increase water temps in the Blue River below, and increases aquatic insect activity.
Local legend, and Trout Unlimited employee Tanner Banks has been making a point to harvest more data on the Blue River below Dillon Reservoir. He recently installed a temperature gauge in town, and here is the latest read out. (ignore the spikes intemperature, those where periods when the thermometer was out of the water.
Sometimes we like to play a game called visual fishing, here is a round from behind our shop on june 3rd. No rod, no flies, just looking, no touching. You will be suprised how much more you take in when just watching a trout without the added pressure of trying to catch it.
The Following pictures are examples of the type of water where you are likely to find trout holding at 1000 CFS in town...
A bend in the river can cause an area of slack water along the "inside" river bank. The lookers right river bank in this photo is perfect example of such a situation...
Jungle fishing in the willows is another likely place one could hook a trout at the moment...
A look at the water through town at 700 CFS...
After a bump in release from Dillon Reservoir, the flows have leveled out at about 400 CFS, and the river in town was nice and clear this Morning (5/8).
Flows from Dillion Reservoir where increased yesterday evening, and the water was a bit off color.
Picture 1 is a specimen of the Baetis nymphs currently found in town, we are seeing a ton of these in sizes 20-24.
Pictures 2 and 3 are from Michelle's outing on the Blue...... Sighting (the trout is underlined in black), and catching a brood stock rainbow trout on a black Crystal Bugger.