Freestone · Mixed · Utah

Weber River

Weber River terrain map
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
  • Level1.72 mDropping after lift
  • 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
1.72 m
Dropping after lift
Water temp20.1°C
ClarityClear
Weather23°C
WindNW 6 km/h
Pressure1015 hPa
Rain · recent4.4 mm
Rain · ahead3.6 mm

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

Water temperature for Brown Trout
Warm — slow
20°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
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 2 active hatches hour by hour 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
Beats · 2

The Weber is northern Utah's workhorse trout river — and its sharpest access test. It runs freestone-and-reservoir hybrid from the Uinta foothills down through Oakley and Morgan, with strong wild browns and some rainbows. The catch is that long stretches cross private ranchland where the streambed is private, and Utah's floating-access law does not turn the right to float into a right to wade. There is real public water here — public access points and lawful bridge / right-of-way crossings — but the unknown reaches should be treated as informational until you've checked. Snowmelt blows the river out in late spring and early summer, so the season is really July through October. Fish the verified public access, mind the ranch boundaries, and you'll have a fine, uncrowded northern Utah day; guess wrong and you'll have a stern conversation with a landowner. Verify navigability and access status reach by reach against UDWR before relying on it.

Public access & bridge crossingsPublic
The verified public end of the Weber — designated public access points and lawful bridge / right-of-way crossings around the Oakley and Morgan reaches.
Private ranchland reachesPrivate
Much of the Weber runs through private ranchland with a private streambed.
Permits & access
Permit required — see local rules.
  • Open all year on most reaches
  • ACCESS CAUTION: much of the Weber runs through private ranchland with a private streambed — Utah's floating-access law does not grant a right to wade
  • Treat unverified reaches as informational only; fish verified public access
  • Snowmelt blows it out late spring/early summer — a seasonal suppressor applies.
What's coming
Plan ahead
5-day outlook
Water here around 20°C. Nothing cooler within range — carry a thermometer.
Water quality · US Clean Water Act
  • Aquatic lifeImpaired
What this classification means

EPA ATTAINS assessment unit 'Weber River-9' (UT16020101-023_00), 2024 Integrated Report. Aquatic Life use: Not Supporting. Listed impairment causes: Oxygen Depletion. 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) · UT16020101-023_00

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 Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity60 × 12%7.2
Limiting factor: Water temperature (20.1°C) is outside Brown Trout's preferred range (10–16°C)= 59
Can you trust it?
Water temperatureair-to-water estimateestimated
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.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Trout1 January31 December
Related guides
Booking & contacts