Freestone · Mixed · Utah, US

Weber River

Fishing the Weber River in Croydon, Utah
Today · About as good as it gets
Sculpin Streamer
Forecast · Today
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
Sculpin Streamer
Sculpin Streamer
Conditions on the water · Today
Live gauge
Level
Falling
1.74 m
Dropping after lift
Water temp9.1°C
ClarityClearing
Weather8°C
WindN 13 km/h
Pressure1029 hPa
Rain · recent0.1 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
Cool — slow
9°C est.ideal 10–16°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
Good — water clarity is right today, though insect activity could be better.
Likely species
Hatch timeline · todayPeak at 21:00

12:00(now) — Western Blue-Winged Olive

Stage: On emergersApproach: Emerger or dryActivity: 51%
Also:Black Midge39%
Peak emergence window5 food groups active

Peak activity at 21:00 — Brown Dun (Brown Dun, 4 food groups active)

Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · October 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
Fly box · Brown Trout
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 · 2
  1. Fishing the Weber River in Croydon, Utah
  2. Terrain map of the venue
    Terrain map
Water quality · US Clean Water Act
  • Aquatic life: Impaired
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 90%
How the 77 is built — score × weight = contribution
Temperature68 × 28%19.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity61 × 12%7.3
Conditions total= 77
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Warmer water — toward the 10–16 °C ideal band — would lift the temperature score.
Directions
Seasons & zones
  • Trout 1 January → 31 December
Related guides
Booking & contacts