Freestone · Mixed · Utah, US

Weber River

Weber River venue image

The Weber is northern Utah's workhorse trout river — a freestone-and-reservoir hybrid that runs from the Uinta foothills down through Oakley and Morgan, holding strong wild browns and some rainbows.

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.
75% projected
Today's fly
Pheasant Tail
Pheasant Tail
Conditions on the water · Tomorrow
Live gauge
Level
Falling
1.64 m
Dropping after lift
Water temp11.9°C
ClarityClearing
Weather16°C
WindN 18 km/h
Pressure1013 hPa
Rain · recent0.2 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 time of day could be better.
Likely species
Hatch timeline · tomorrowPeak at 12pm

12pm(now) Mahogany Dun

Stage: On emergersApproach: Emerger or dryActivity: 95%
Also:Reed Smut36%
Peak emergence windowDegree-days at peak6 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 2 guilds with Pro.

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Beyond the hatch · worth watchingambient prey(1)

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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
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
Other water nearby · 3
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

The Weber is northern Utah's workhorse trout river — a freestone-and-reservoir hybrid that runs from the Uinta foothills down through Oakley and Morgan, holding strong wild browns and some rainbows. It can fish beautifully: pocket water and undercut banks, hoppers in late summer, a good streamer bite for the browns. It's also exactly the river where bad access advice gets you a stern conversation with a landowner. Stretches run through private ranchland where the streambed is private, and the law's floating right is not a wading right. Treat the unknown reaches as informational only until you've checked, fish the verified public access and the bridge crossings, and you'll have a fine, uncrowded northern Utah day.

  • Mixed
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 75%
How the 81 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 81
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