Blue River Silverthorne

Blue River - Silverthorne

Difficulty Intermediate/Advanced
Ideal Days To Fish 4/9, 4/11 & 4/13

Weekly Report

Report DateApril 8, 2021
As per usual, the Blue has been fairly productive over the last few days. While it can be hit or miss, things continue to look up given mild weather and new bug life. Flows are low and trout continue to podd up in the deep and slow water. That said, with mild weather in the coming days you can expect them to move about the water more freely and feed in the faster moving water. Nymphing continues to produce the best results. While small and simple midge and baetis flies will garner results, we’d encourage you to mix it up. Given low air pressure between 4/8 and 4/11, you’ll want to consider bigger lead flies like a Barr’s Tungstone, Pat’s Rubber Legs, Mini Leech or caddis larva. Otherwise, trail with one or more smaller imitative midge or baetis larva/pupa. Midges remain the primary food source, but BWOs and the Mother’s Day caddis hatch are just around the corner. As such focusing on larvae in these varieties is a good idea. Surface action can be hit or miss, but continues to improve so be conscious of actively rising trout and don’t hesitate to rig up some dries. Double dry and dry to an emerger rigs have been particularly effective in the late morning and afternoon. However, traditional dry droppers have been producing as well. If you go this route, rig up a small, yet, buoyant caddis dun or micro Chubby followed by one or more smaller searcher patterns with tungsten beads so as to get your flies down.

Recommended Flies

River Flow

Flow Region

Detailed River Info


Below Dillon Dam is a prized section of the Blue River that runs 19 miles until it meets the Green Mountain Reservoir. The stretch of river that runs through the town of Silverthorne is one of the most sought after tail waters in Colorado. Dillon Reservoir is one of the few Colorado reservoirs that was stocked with Mysis Shrimp and as a result, when water is released from the dam, shrimp trickle into the river. This calorie-rich meal is the trout equivalent to a body builders training supplement and results in some beefy fish! This section of the Blue is unique in that it runs through the tourist heavy town of Silverthorne. Therefore, if you are looking for a fishing experience full of spectators touting Tommy Hilfiger bags with a shot at landing a trophy trout, the section through Silverthorne is for you. If you are seeking more solitude and less materialism, head north down Highway 9 and pull off at one of the designated parking areas for fishing access.


The Silverthorne stretch of the Blue is a pocket water paradise. Anglers can leave their “A River Run’s Through It” casts at home and instead focus on short and tactical casts. Anglers can expect to find Rainbow, Brown and Brooke trout along this stretch with the highest concentration of trophy Rainbows being located below the dam. With the exception of Mysis Shrimp, the fly selection for the Blue is relatively consistent with the other popular Colorado tail waters. Size 18 – 24 Midge and Baetis nymphs produce year round. In the warmer months, this stretch of the Blue experiences quality Green Drake and BWO hatches. The Blue River is an accessible year round fishery and can easily be coupled with a half ski, half fish day or a family trip to the outlet malls where you drop the family and you seek much needed alone time on the water. 

River Access

The tail water section of the Blue River below Dillon Reservoir has several miles of public water access between the town of Silverthorne and Green Mountain Reservoir. The most popular section runs behind the Silverthorne Outlets and can be accessed very easily. If you're looking for more solitude, wander north on Highway 9 towards Green Mountain Reservoir. While there is sporadic stretches of private water, the public water sections can be easily identified by parking and Department of Wildlife signage.