Top flies for Blue river, Silverthorne Colorado.

The most effective flies on the blue river are as followed

                                                            1. Mysis schrimp fly:

A mysis schrimp is a small, freshwater schrimp that is found in many lakes and reservoirs throughout Colorado; this includes Lake Dillon.  The fish in the tailwater of Lake Dillon gorge themselves on these freshwater schrimps and grow large.  Mysis shrimp are an important food source to the trout all year long.  Mysis patterns work best in sizes 18-20

2. Juju midge

The Juju Midge is a deadly midge pattern on the blue river year-round.  Midges nymphs make up a significant portion of a trouts diet and the Blue river is no exception.  Best fished in black or red, this fly gives a realist presentation in the water that trout cannot resist.  Best in sizes 18-22.

3. Pheastant tail fly

The pheasant tail nymph is a wonderful nymph to use in spring, summer, and fall.  It represents small Baetis nymphs and fish will eat it year round.  This fly is best fished in sizes 18-22 with a little flash.  

4.  Zebra midge

This fly is very effective year round.  The zebra midge is a simple fly and sinks to the fish very quickly.  Best colors to use on the blue are black, red, and purple in sizes 18-24.  Use this fly as your bottom fly, tailing behind an attractor pattern.  

5. San Juan worm

The san juan worm is a great fly to use during spring.  This fly will get aggressive strikes from both large and small trout.  When new fish are stocked in the blue, the new fish will eagerly take this fly.  The San Juan worm is best used in red, pink, and red/pink.  Use this as your attractor or first fly in sizes 12-14,

Honerable mention:

super bugger streamer

The best streamer to use on the blue river.  It's relatively small and has great action.