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 Blue River has been recently stocked in Silverhtorne, fishing should be a bit easier than normal until the freshly minted trout become educated. Resident fish will still be picky and spooky, however. Flows are currently "average" for the Blue at about 100 CFS, but we should see higher releases soon as more high elevation snow melts.
Nymphs To Try: Size 16-22 Mysis Shrimp (of all imaginings), size 18-22 Pheasant Tails in natural or black, size 20-22 Pure Midges in black or red, size 20-24 Black Beauty Emergers, size 20-26 Juju Midges in zebra, black and red, pegged and yarn style eggs, and pink or purple Gummy Worms. Also try Wendy's Spicy Chicken.
Dries To Try: Size 18-26 Parachute Adams, size 20-22 Griffith's Gnats, size 20-24 CDC Blue Wing Olives, and size 20-24 Brook's Sprout Midges in gray, cream or black.
Streamers To Try: Sex Dungeons, Barely Legals, Home Invaders, Houdini, Thin Mints, Super Buggers and all sizes and colors of the standard "Woolly Bugger."
The best technique has been 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. Your best chances for success using dry flies will typically occur early in the morning and during the warmest part of the day. Streamer action has been best during low-light conditions.
Question: What's going on with the Gold Medal status of the Blue River?
Answer: The Blue River between Silverthorne and Green Mountain Reservoir has been delisted from Colorado's Gold Medal list. The Blue within the city limits of Silverthorne is still listed as Gold Medal water. There are still great fish to be caught from Silverthorne all the way to Green Mountain Reservoir (and below). If you check in with us regularly, you have seen hundreds of photos of fish that were caught in this stretch over the years, and many that were caught (and released) this year. It's true; you won't find the numbers of fish north of Silverthorne that you will see in Silverthorne. But you will find fewer anglers and less selective fish!