Freestone · Mixed · Colorado, US

Roaring Fork River

Roaring Fork River — Headwaters of the 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.

Tomorrow · About as good as it gets
Orange Stimulator
Forecast · Tomorrow
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.
75% projected
Today's fly
Orange Stimulator
Orange Stimulator
Conditions on the water · Tomorrow
Live gauge
Level
Steady
0.55 m
Water temp13.4°C
ClarityClear
Weather19°C
WindN 9 km/h
Pressure1017 hPa
Rain · recent1.8 mm
Rain · ahead0.3 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
Ideal
13°C est.ideal 1016°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 insect activity could be better.
Likely species
Hatch timeline · tomorrowPeak at 6pm

12pm(now) Mahogany Dun

Stage: On emergersApproach: Emerger or dryActivity: 81%
Also:Reed Smut76%Flying Ants40%
Peak emergence window8 food groups active

Peak activity at 6pm — October Caddis (October Caddis, Degree-days at peak)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds with Pro.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

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Evidence
Records-basedModerate confidence

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

Through the year
0–3 scale · September 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. Roaring Fork River — Headwaters of the Roaring Fork River
    Headwaters of the 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 84 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity55 × 12%6.6
Conditions total= 84
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Seasons & zones
  • Trout 1 January31 December
Related guides
Booking & contacts