Freestone · Limestone · Utah

Logan River

Logan River terrain map

The Logan is the antidote to the tailwater crowds — a tumbling limestone-canyon freestone in northern Utah that holds browns, rainbows and, up in the cold headwater reaches, native Bonneville cutthroat that deserve a careful hand and a quick release.

Prime · Brown Trout
Chubby Chernobyl · 6-10
Primelive now
About as good as it gets
River steady at a fishable height. On the feed top to bottom — start on the rises with a dry, drop a nymph if they stay down.
90% confidence
What moved it
  • Level0.78 mLast reading 15h ago
  • Water temp12.9°C
  • ClarityClear
Today's fly
Chubby Chernobyl
Chubby Chernobyl6-10
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.78 m
Last reading 15h ago
Water temp12.9°C
ClarityClear
Weather15°C
WindE 6 km/h
Pressure1015 hPa
Rain · recent2.1 mm
Rain · ahead0.2 mm

Live readings — water temperature is an estimate where the gauge does not record it.

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.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 4 active hatches hour by hour with Pro.

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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

Hatch predictions

Top prey shown — see all 3 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.
  • Open all year
  • The native Bonneville cutthroat in the headwaters are conservation-sensitive — handle with care and verify any cutthroat-specific or upper-reach release rules against UDWR
  • Snowmelt colours it in spring.
What's coming
Plan ahead
5-day outlook
Other water nearby · 1
About this water

The Logan is the antidote to the tailwater crowds — a tumbling limestone-canyon freestone in northern Utah that holds browns, rainbows and, up in the cold headwater reaches, native Bonneville cutthroat that deserve a careful hand and a quick release. It's small-stream fishing the way it's meant to be: dry-dropper through the pockets, attractors the fish actually come up for, careful wading on a bouldery bed. The canyon access is easy off the highway. Spring runoff colours it for a while; once it drops and clears, late spring through autumn, it's a lovely, uncomplicated river that reminds you not every good day needs a famous name on it.

  • Limestone
Water quality · US Clean Water Act
  • Aquatic lifeImpaired
  • RecreationImpaired
What this classification means

Recreation: Bacteria/pathogen advisory — mind wading cuts and immersion.

EPA ATTAINS assessment unit 'Logan River-2' (UT16010203-006_00), 2024 Integrated Report. Aquatic Life use: Not Supporting. Listed impairment causes: pH Acidity Caustic Conditions. This is a Clean Water Act assessment-unit classification (the US analogue of WFD), not a live reading.

Status is for the Clean Water Act assessment unit covering this reach.

EPA ATTAINS (Clean Water Act) · UT16010203-006_00

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 Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity53 × 12%6.4
Conditions total= 83
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
  • Trout1 January31 December
Related guides
Booking & contacts