Freestone · Mixed · Utah, US

Duchesne River

Duchesne River terrain map

The Duchesne is the Uinta Basin's home freestone — the river you fish when you want trout and elbow room in the same day, off on the quiet side of the range from the Provo crowds.

Tomorrow · About as good as it gets
Pheasant Tail
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.
90% projected
Today's fly
Pheasant Tail
Pheasant Tail
Conditions on the water · Tomorrow
Live gauge
Level
Falling
0.39 m
Dropping after lift
Water temp12.3°C
ClarityClearing
Weather17°C
WindN 6 km/h
Pressure1012 hPa
Rain · recent1.7 mm
Rain · ahead0.0 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
12°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 12pm

12pm(now) Mahogany Dun

Stage: On emergersApproach: Emerger or dryActivity: 95%
Also:Reed Smut43%
Peak emergence windowDegree-days at peak5 food groups active

Peak activity at 12pm — Mahogany Dun (Mahogany Dun, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 2 with Pro.

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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.
  • Open all year (statewide default)
  • Verify current UDWR gear/limit rules
  • Native Colorado River cutthroat in the headwaters and tributaries are conservation-sensitive — handle with care
  • Access lower down is complicated by irrigation diversions and private ground; fish verified public reaches and confirm before promoting any stretch.
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
About this water

The Duchesne is the Uinta Basin's home freestone — the river you fish when you want trout and elbow room in the same day, off on the quiet side of the range from the Provo crowds. It tumbles down out of the high Uintas through Tabiona and the canyon country, a classic snowmelt river with wild and stocked browns and rainbows and, up in the cold upper reaches and tributaries, Colorado River cutthroat that carry the basin's native bloodline and deserve a wet hand and a gentle release. It fishes the way a mountain freestone should: pocket water and riffle-run-pool, a dry-dropper or a hopper-dropper drifted through the soft spots, attractors the fish actually come up for. Runoff colours and swells it through late spring, but once it drops and clears — usually high summer into autumn — it's an honest, uncrowded river that rewards reading water over knowing secrets. Mind the access lower down, where irrigation diversions and private ground complicate both the flows and the right to fish.

  • Mixed
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 Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity63 × 12%7.6
Conditions total= 84
Can you trust it?
Water temperatureair-to-water estimateestimated
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 January31 December
Related guides
Booking & contacts