Freestone · Limestone Sandstone · Utah, US

Diamond Fork Creek

Diamond Fork flowing under railroad tracks, Jul 15
Tomorrow · Not the day for it
Sex Dungeon
Forecast · Tomorrow
Not the day for it
Not much stacked in your favour today. Worth an hour if you are nearby, not worth the special trip.
45% projected
Today's fly
SD
Sex Dungeon
Conditions on the water · Tomorrow
Live gauge
Level
Rising
1.26 m
Lifting fast
Water temp9.3°C
ClarityUnfishable
Weather9°C
WindN 12 km/h
Pressure1012 hPa
Rain · recent0.4 mm
Rain · ahead0.1 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
Excellent — water clarity is right today, though insect activity could be better.
Likely species
Mayflies
Chironomids
Gammarids
Hatch timeline · tomorrowPeak at 11 Uhr

12 Uhr(now) — Western Blue-Winged Olive

Stage: On emergersApproach: Emerger or dryActivity: 21%

Peak activity at 11 Uhr — Western Blue-Winged Olive

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
Permits & access
Permit required — see local rules.
  • Verify UDWR rules and access/parking details
  • Do not overpromise solitude near Fifth Water / hot-springs traffic.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Strawberry Reservoir
23 km
Cutthroat trout · Rainbow trout
Strawberry River (tailwater)
30 km
72
Brown trout · Cutthroat trout
Lower Provo River
37 km
82
Brown trout · Rainbow trout
Middle Provo River
53 km
81
Brown trout · Rainbow trout
Price River
60 km
80
Brown trout · Rainbow trout
Gallery · 2
  1. Diamond Fork flowing under railroad tracks, Jul 15
  2. Terrain map of the venue
    Terrain map
Water quality · US Clean Water Act
  • Aquatic life: Supporting
What this classification means

EPA ATTAINS assessment unit 'Diamond Fork-1' (UT16020202-006_00), 2024 Integrated Report. Aquatic Life use: Fully Supporting. 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) · UT16020202-006_00

The full read · show the working · for Brown Trout · confidence 90%
How the 81 is built — score × weight = contribution
Temperature87 × 28%24.4
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity63 × 12%7.6
Conditions total= 81
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 January → 31 December
Related guides
Euro Nymphingsubsurface methods
Booking & contacts