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Blue River (Silverthorne tailwater)

Tailwater · Dillon Dam through SilverthorneClass 2Fair / Picky
92

● Live flow & water temp from USGS

54 cfs
Flow
44°F
Water temp
39.626, -106.066
Location · USGS gauge
40–200
Ideal flow · cfs
Conditions · water 40–46°F

~54 cfs Silverthorne (Cutthroat Anglers 6/15) · low/clear · sight-fishing classic · stocked fish wisened up · water temp 40s°F · Blue below Green Mtn spiked to ~579 cfs (CTA 6/15: flows 'all over the place,' fluctuating sporadically — check gauge every AM before driving down)

Strategy

Per Cutthroat Anglers 5/26: 'Fish were stocked end of March but fishing pressure has caught up and most fish have been caught and wisened up. Back to technical tailwater strategies with tiny flies (22-24) and 5x tippet. Flies like the RS2, WD40, and basic thread midges have been great. Think natural, no bead heads, minimal flashback. Sight fishing the key to success.' Long 12-14 ft leaders. Today (Wed) ~76°F mountain pocket, mild and pleasant, the real heat building toward midweek; fish all day.

Detailed report

Cutthroat Anglers 6/15: Silverthorne holding ~54 cfs, water temp 40s°F, clear; Blue below Green Mountain spiked to ~579 cfs (CTA 6/15: flows 'all over the place,' expect sporadic fluctuation — check gauge every AM before heading down). Mysis stays year-round staple; tiny mayfly/midge stuff doing heavy lifting on Silverthorne section. Long leaders (12-14 ft) with 5X tippet. Sight fishing the key. Mountain pattern: today (Wed) ~76°F, sunny and dry with the weekend front cleared; mostly sunny ~73–76°F through Thu with only slight storm chances, the real heat building on the plains toward midweek. CTA FREE evening workshop series every Wed.

Report: Cutthroat Anglers / Fly Fish Food · June 15, 2026 (CTA last update) · Cutthroat Anglers staff + Fly Fish Food

Fly-shop reports

3 shops report on Blue River (Silverthorne tailwater)

Reports are pulled live from each shop when you open this river. Shop wording varies — tap through for the full, original report.

Fishability Score breakdown

How today's 92 is built. Flow 35% · Water temp 25% · Weather 20% · Hatch 20%.

Flow100/100
Water temp100/100
Weather76/100
Hatch match82/100

Weather & hatch are placeholder factors until wired to live sources.

What to throw — by time of day

Morning
Dawn – 11am

RS-2 #22–24, WD-40 #22, basic thread midge #22, Mysis #18–22 (no bead-head)

MiddayNOW
11am – 5pm

BWO emerger #20 to risers (overcast), Mysis #18, Black Beauty #22, JuJu Baetis #18

Evening
5pm – dark

Tiny midge cluster #22, soft hackle swing, fish-the-film with parachute Adams #20

Species
Rainbow · Brown
USGS gauge 09050700

Seasonal hatch report

In season now

Fall — BWOs & Streamers

Cooling water wakes the fish up. Blue-Winged Olives return on grey afternoons, and pre-spawn browns chase streamers hard.

Morning
Dawn – 11am
Hatching
Midges · BWO nymphs · Trico (early fall)
Flies
Pheasant Tail #18, RS-2 #20, Trico spinner #24
Rig
Nymph deep; streamer the banks early for aggressive browns.
Afternoon
NOW
11am – 5pm
Hatching
Blue-Winged Olives · October caddis (freestone)
Flies
BWO dun #20-22, Parachute Adams #20, October Caddis #10
Rig
Overcast = dry BWOs; otherwise swing/strip streamers for browns.
Evening
5pm – dark
Hatching
BWO spinners · Streamer window
Flies
Sculpin/Woolly Bugger #6-8, RS-2 #20
Rig
Strip big flies through frog water at last light for the biggest fish.
Source: Hatchwise Seasonal Guide · updated Jul 5, 12:00 PM MT. General seasonal patterns — verify against a current local shop report before you go.

Sources & last updated

SourceFeedsMost recent update
USGS 09050700 Blue River (Silverthorne tailwater)Sep 14, 11:15 AM MT · flow + temp live
Hatchwise Seasonal GuideHatch & fly guidanceJul 5, 12:00 PM MT · editorial
Cutthroat Anglers Shop fly reportLive — see report
Fly Fish Food Shop fly reportLive — see report
BlueStream Fly Shop fly reportLive — see report

Live flow & water temp come straight from the USGS Instantaneous Values service; timestamps are the gauge's own reading times (Mountain Time).