Freestone · Mixed · Colorado, US

Roaring Fork River

Aspen bridge over Roaring Fork River

The Roaring Fork is a big, generous valley freestone that gathers the Fryingpan and the Crystal on its way from Aspen down to Glenwood, growing browns, rainbows and a healthy run of mountain whitefish along the way.

Today · About as good as it gets
Sculpin Streamer
Forecast · Today
About as good as it gets
On the feed top to bottom — start on the rises with a dry, drop a nymph if they stay down.
90% projected
Today's fly
Sculpin Streamer
Sculpin Streamer
Conditions on the water · Today
Live gauge
Level
Falling
0.56 m
Dropping after lift
Water temp9.6°C
ClarityClearing
Weather11°C
WindN 2 km/h
Pressure1033 hPa
Rain · recent1.0 mm
Rain · ahead0.2 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Cool — slow
10°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Excellent — water temperature is right today, though time of day could be better.
Likely species
Hatch timeline · todayPeak at 9pm

12pm(now) — Western Blue-Winged Olive

Stage: On emergersApproach: Emerger or dryActivity: 55%
Also:Black Midge37%
Peak emergence window5 food groups active

Peak activity at 9pm — Brown Dun (Brown Dun, 4 food groups active)

Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Supporters see what else is on the menu.

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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
2
2
2
2
1
Brown DunHatch
2
3
3
3
3
3
3
2
Western Green DrakeHatch
2
2
Flav (Small Western Green Drake)Hatch
2
3
2
Mahogany DunHatch
2
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Brown Trout fly box
SD
Sex Dungeon
2-6 · Pattern
Proven pattern for this period
Permits & access
Permit required — see local rules.
  • Colorado licence
  • Gold Medal lower river — verify CPW rules
  • Mind summer thermal stress and tributary (Crystal) closures.
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
Gallery · 2
  1. Aspen bridge over Roaring Fork River
    Roaring Fork River
  2. Terrain map of the venue
    Terrain map
About this water

The Roaring Fork is a big, generous valley freestone that gathers the Fryingpan and the Crystal on its way from Aspen down to Glenwood, growing browns, rainbows and a healthy run of mountain whitefish along the way. It's a float-and-wade river with real size to it, best after the June runoff drops and the caddis, stoneflies and BWOs get going. Tie it together with the Fryingpan and the upper Colorado as a Roaring Fork Valley cluster — when one's blown or warm, another's usually fishing. The lower river near Glenwood warms in high summer, so mind the afternoons.

Under the surface

The Roaring Fork falls out of the high country above Aspen and runs sixty-odd miles down to the Colorado at Glenwood Springs, gathering the Fryingpan and the Crystal on the way and growing from a pocket-water creek into a big, brawling freestone. The upper river near Aspen is steep and quick over granite and cobble; by the time it reaches Carbondale and Glenwood it's a substantial Gold Medal river of long riffles, deep runs and willow-lined gravel bars beneath the Elk Mountains. The flow is honest snowmelt-and-tributary water, high and off-color in June, dropping into prime shape through the summer and fall. The bed is rounded freestone, the lies in the seams and drop-offs. Wading is real freestone work, slick and uneven, and the lower river is big enough that a drift boat sees the best of it.

Wading: High off color runoff, slick uneven rock

  • Mixed
  • Partly confined
  • Pool riffle
The full read · show the working · for Brown Trout · confidence 90%
How the 83 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity62 × 12%7.4
Conditions total= 83
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Trout 1 January → 31 December
Related guides
Booking & contacts