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Blue River (Silverthorne) Fishing Report

Updated Fri, Sep 4, 2026 from live gauge and weather data

The Silverthorne tailwater: mysis-fattened rainbows under the outlet-mall parking lots.

2/5
Slow. Work for them.Conditions favor short windows and patient fishing.
Flow
54 cfs
Air / High
76 / 77 F
Wind
SW 8 mph

Sources: USGS gauge 09050700, Open-Meteo, solunar calculated for these coordinates.

Satellite view
Friday
4
September 2026

Today's Fishing Report

Generated this morning from live readings: gauge, weather model, sun and moon. A fresh report is published here every morning.

2/5Slow. Work for them.Conditions favor short windows and patient fishing.

Blue River (Silverthorne) rewards those who follow the bait as the water cools. The river is running 54 cfs, steady over the week. Today brings clear skies, wind SW around 8 mph, rising pressure near 1004 hPa and a high of 77. Water sits around 54 F for the season (estimated). With the last quarter, the solunar majors run 5:39 AM-7:39 AM and 5:39 PM-7:39 PM: the windows to build the day around.

The plan, species by species

Rainbow troutGood

Blue-winged olives and midges on soft seams; streamers on overcast days move the better fish.

Brown troutGood

Pre-spawn aggression: this is streamer season for the fish of the year.

Tomorrow: Similar at 78 F. The solunar majors shift about 50 minutes later.Next report: Sat, Sep 5, 6:30 AMHow this report is made →

Water and weather

Live readings from BLUE RIVER BELOW DILLON, CO..

Flow, last 30 days

USGS gauge 09050700.

54545454 cfs08/0508/1508/2509/04

Right now

Latest readings

Air temp76 F
High / Low77 / 43 F
WindSW 8-11 mph
Pressure1003.7 hPa, rising
Sky / Rain23% cloud, 11%
Sunrise / Sunset06:35 / 19:30
MoonLast Quarter, 50%
Water temp (seasonal)~54 F est.

Bite planner

Hour-by-hour bite forecast for today. Tap a bar to see why.

5 AM8 AM11 AM2 PM5 PM8 PMsunrisesunset

Next 7 days

Tap a day for the detailed outlook.

Fri Sep 4 · Overcast, 77/43 F, wind 11 mph, rain 11%

Fair or better. A 11 mph breeze puts a working chop on the banks it hits: fish the wind-blown side.

Species guide

The species that matter on Blue River (Silverthorne): seasons, structure and how to fish each one. Today's ratings live in the report above.

Rainbow trout illustration

Rainbow trout

Best: Apr-Jun, Sep-Oct

The workhorse of western rivers: riffles, seams and dry-fly eats. Blue-winged olives and midges on soft seams; streamers on overcast days move the better fish.

Brown trout illustration

Brown trout

Best: Sep-Nov

Wary, predatory and nocturnal by preference. The big ones eat streamers. Pre-spawn aggression: this is streamer season for the fish of the year.

When to come: the Blue River (Silverthorne) calendar

Activity by species and month, and how the water warms through the year. Tap any cell.

Species activity by month

1 = slow, 5 = peak. Current month highlighted.

J
F
M
A
M
J
J
A
S
O
N
D
Rainbow trout
Brown trout
SlowPeak

Water temperature through the year

Typical surface temperature for this water type; today is around 54 F (estimated, not a reading).

30405060JanMarMayJulSepNovSep, ~54 F now

Angler reports

Real reports from real anglers, reviewed before publishing. The water log below tracks each day automatically.

No angler reports yet this weekBe the first: your report helps every angler who checks Blue River (Silverthorne) today, and we feature the best catch of the week.

Water log, last days

Auto-logged from live data
Thu, Sep 3

3/5 Fair. Fish the windows. A steady pattern: dawn and dusk carry the day. Rainbow trout led the card at good. High of 77 F, wind to 12 mph.

Wed, Sep 2

3/5 Fair. Fish the windows. A steady pattern: dawn and dusk carry the day. Rainbow trout led the card at good. High of 73 F, wind to 12 mph.

Tue, Sep 1

3/5 Fair. Fish the windows. A steady pattern: dawn and dusk carry the day. Rainbow trout led the card at good. High of 70 F, wind to 12 mph.

Where roughly, what depth, what bait. Skip anything you want to keep secret.
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Before you go

License

Colorado requires a valid fishing license for adults. Buy online from the state agency; one-day options exist for visitors.

Regulations

Gold Medal rules: artificials only, 2-trout over 16 inches below Dillon. Confirm with CPW.

Access

Silverthorne outlet parking for the tailwater; CO-9 pullouts and campground access downstream.

About this water

Tailwater of Dillon Reservoir through Summit County, CO; Gold Medal water to Green Mountain.

Fishing Blue River (Silverthorne): the full guide

I-70's strangest trophy water

The Blue below Dillon Reservoir runs cold and clear through Silverthorne: mysis shrimp from the dam grow football rainbows that sip size-22 flies between shoppers. Winter is prime (the dam keeps it open), and the canyon below toward Green Mountain fishes wilder for browns.

Mysis magic below the dam

Dillon's deep release pours mysis shrimp into the first mile: the football rainbows that result eat white imitations year-round. Winter is prime: low clear flows, visible pods between the outlet stores, and 5X honesty about your drift. Crowds match the quality: fish early.

Below Silverthorne

The canyon toward Green Mountain Reservoir relaxes: browns take over, attractor dries work all summer, and the Blue earns its Gold Medal stretch designation with solitude the outlet mall never sees. Access via Blue River Campground and pullouts along CO-9.

Tailwater in a ski town

The Blue below Dillon Dam runs cold and technical straight through Silverthorne's outlet malls: mysis-fattened rainbows sip size-22 patterns behind the Starbucks, indifferent to shoppers. Winter fishes surprisingly well (the dam smooths temperatures), and spring's mysis flushes bring the giants up. Below Green Mountain Reservoir, the lower Blue relaxes into freestone form: two personalities, one short drive.

Common questions

Why do Blue River rainbows look so fat?

Mysis shrimp from Dillon's depths: a protein subsidy most rivers never see. The fish shape (and the white-fly obsession) follows the food.

Is the Blue River gold medal water?

The reach below Dillon holds Gold Medal designation: high fish-per-mile of quality trout. Artificial flies and lures only in the designated stretch: check CPW signage at access points.

Is fishing good at Blue River (Silverthorne) right now?

Check the daily report at the top of this page: it is regenerated every morning from live data. Today's read: Slow. Work for them. Conditions favor short windows and patient fishing.

Nearby waters

Dillon Reservoir2 miGore Creek20 miTarryall Reservoir37 miLake Granby38 miEvergreen Lake39 miClear Creek (Golden)40 mi
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