Freestone · Volcanic Sedimentary · Utah, US

East Fork Sevier River — Kingston Canyon

East Fork Sevier River — Kingston Canyon terrain map

The East Fork Sevier through Kingston Canyon is the southern Utah river a Californian road-tripper will actually remember: a high-desert trout stream under red and volcanic country, with cutthroat, browns and rainbows and enough public access to make it practical without pretending the whole drainage is open.

Tomorrow · Not the day for it
Pheasant Tail
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
Pheasant Tail
Pheasant Tail
Conditions on the water · Tomorrow
Estimate
Level
Dry recently
No gauge reading
Water temp12.0°C
ClarityUnfishable
Weather16°C
WindN 4 km/h
Pressure1020 hPa
Rain · recent0.9 mm
Rain · ahead0.0 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for Brown Trout
Ideal
12°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 temperature is right today, though insect activity could be better.
Likely species
Mayflies
Caddisflies
Hatch timeline · tomorrowPeak at 12pm

12pm(now) — Mahogany Dun

Stage: On emergersApproach: Emerger or dryActivity: 78%
Also:Reed Smut29%
Peak emergence windowWeather boostDegree-days at peak5 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)

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 · 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
Permits & access
Permit required — see local rules.
  • Verify UDWR current rules and public-access boundaries
  • Do not imply continuous public wading access through private land; surface verified access parcels only.
What's coming
Plan ahead
5-day outlook
Other water nearby · 4
Beaver River
41 km
Brown trout · Rainbow trout
Fish Lake
51 km
Rainbow trout · Brown trout · Brook trout
Fremont River
53 km
Brown trout · Rainbow trout
Boulder Mountain Lakes
54 km
Brook trout · Cutthroat trout · Rainbow trout
About this water

The East Fork Sevier through Kingston Canyon is the southern Utah river a Californian road-tripper will actually remember: a high-desert trout stream under red and volcanic country, with cutthroat, browns and rainbows and enough public access to make it practical without pretending the whole drainage is open. It is not a Green River-style tailwater and not a Sierra alpine creek; it is a working canyon river with irrigation influence, public-access patches and streamer-friendly deeper bends. For a California angler crossing Utah on Highway 89 or building a Bryce / Capitol Reef / Boulder Mountain loop, it is one of the most useful river additions in the state.

  • Volcanic sedimentary
Water quality · US Clean Water Act
  • Aquatic life: Impaired
What this classification means

EPA ATTAINS assessment unit 'East Fork Sevier River-4' (UT16030002-005_00), 2024 Integrated Report. Aquatic Life use: Not Supporting. Listed impairment causes: Temperature, Nutrients. 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) · UT16030002-005_00

The full read · show the working · for Brown Trout · confidence 90%
How the 80 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity55 × 12%6.6
Conditions total= 80
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