Freestone · Mixed · Colorado

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.

Marginal · Brown Trout
Parachute Adams · 12-18
Marginallive now
Slow going — pick your moments
River temperature is the limiting factor today, not the flow. Fish dawn or dusk if you go at all, and handle everything with extra care.
80% confidence
What moved it
  • Level0.47 mLast reading 16h ago
  • Water temp20.1°C
  • ClarityClear
Today's fly
Parachute Adams
Parachute Adams12-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.47 m
Last reading 16h ago
Water temp20.1°C
ClarityClear
Weather19°C
WindNW 4 km/h
Pressure1018 hPa
Rain · recent0.1 mm
Rain · ahead0.8 mm

Live readings only. Trends shown where the gauge supports them.

Water temperature for Brown Trout
Warm — slow
20.1°Cideal 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
Water at 20.1°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 3 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

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Evidence
ModelledModerate confidence

Modelled from regional ecology — no survey or occurrence data for this water yet.

Through the year
0–3 scale · July 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
Western Green DrakeHatch
2
2
Flav (Small Western Green Drake)Hatch
2
3
2
Mahogany DunHatch
2
2
American March BrownHatch
2
3
2

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

Ranked for today
Brown Trout fly box
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
Cooler water nearby · 1
Water here at 20.1°C — the fishing's alive, but these are cooler if you'd rather rest the warm water.
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 80%
How the 27 is built — score × weight = contribution
Temperature24 × 28%6.7
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity58 × 12%7.0
Limiting factor: Water temperature (20.1°C) is outside Brown Trout's preferred range (10–16°C)= 63
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
Directions
Seasons & zones
  • Trout1 January31 December
Related guides
Booking & contacts