Tailwater · Sandstone · Arizona

Colorado River — Lees Ferry

The Colorado River flowing through red-rock Marble Canyon at Lees Ferry, Arizona, with the Vermilion Cliffs rising behind.

Lees Ferry is the trout water at the bottom of Glen Canyon Dam — a fifteen-mile ribbon of cold, clear green river running between thousand-foot sandstone walls before the whole thing tips over into the Grand Canyon.

Marginal · Rainbow Trout
Sparkle Dun · 14-18
Marginallive now
Slow going — pick your moments
River lifting fast on the rain. Slow going — pick your moments and do not force it.
80% confidence
What moved it
  • Level2.51 mLifting fast
  • Water temp19.7°C
  • ClarityVery colouredColouring up
Today's fly
SD
Sparkle Dun14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Rising
2.51 m
Lifting fast
Water temp19.7°C
ClarityVery coloured
Weather30°C
WindSW 9 km/h
Pressure1013 hPa
Rain · recent0.0 mm
Rain · ahead0.6 mm

Live readings only. Trends shown where the gauge supports them.

Water temperature for Rainbow Trout
Warm — slow
19.7°Cideal 1018°C
0°14°28°
How to fish it · for Rainbow 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 19.7°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

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Sub-surface · on the nymphunder the surface

Hatch predictions

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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 Blue-Winged OliveHatch
2
3
3
3
3
3
3
3
2
Pale Morning DunHatch
2
3
3
2
TricoHatch
2
3
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Rainbow Trout fly box
Local fly shops: Lees Ferry Anglers
Permits & access
Permit required — see local rules.
  • Open all year
  • Arizona licence required; check AZGFD reach-specific rules and the walk-in vs boat-access sections.
What's coming
Plan ahead
5-day outlook
Water here at 19.7°C. Nothing cooler within range.
Gallery · 2
  1. The Colorado River flowing through red-rock Marble Canyon at Lees Ferry, Arizona, with the Vermilion Cliffs rising behind.
    Colorado River at Lees Ferry Marble Canyon, Grand Canyon National Park, Arizona
  2. Terrain map of the venue
    Terrain map
About this water

Lees Ferry is the trout water at the bottom of Glen Canyon Dam — a fifteen-mile ribbon of cold, clear green river running between thousand-foot sandstone walls before the whole thing tips over into the Grand Canyon. It's a wild rainbow fishery, and a strange, wonderful place to fish: you can wade the gravel bars near the ferry or run a boat up to the dam, and the trout eat midges and scuds all year because the water comes off the bottom of Lake Powell at a steady cold temperature no matter what the desert is doing overhead. Watch the release, not the weather — the river breathes with the dam.

Under the surface

Lees Ferry is a trout fishery that has no business existing, which is exactly what makes it wonderful — fifteen miles of cold, clear water running out of Glen Canyon Dam through the bottom of a sandstone gorge in the Arizona desert, where before the dam the Colorado ran warm and red with silt. The cold bottom release, a constant forty-six to fifty degrees, turned it into a blue-ribbon rainbow trout river, the fish now wild and self-sustaining, holding over bright gravel bars and in the glassy runs beneath thousand-foot walls of Navajo sandstone. It's the only place in more than two hundred and sixty miles where the Colorado isn't pinned between sheer cliffs. The bed is clean gravel and cobble; the water is gin-clear and cold. Wading the bars is good and a boat from the dam opens the rest. It is surreal, gorgeous, desert trout fishing.

Wading: Cold clear water, fluctuating dam releases

  • Sandstone
  • Partly confined
  • Pool riffle
Water quality · US Clean Water Act
  • Aquatic lifeImpaired
What this classification means

EPA ATTAINS assessment unit 'Colorado River, from GLEN CANYON DAM to LEES FERRY' (AZ14070006-001_00), 2024 Integrated Report. Aquatic Life use: Not Supporting. Listed impairment causes: Metals Other Than Mercury. 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) · AZ14070006-001_00

The full read · show the working · for Rainbow Trout · confidence 80%
How the 29 is built — score × weight = contribution
Temperature51 × 28%14.3
Flow55 × 22%12.1
Clarity45 × 18%8.1
Feeding Time45 × 13%5.9
Pressure75 × 7%5.3
Insect activity43 × 12%5.2
Conditions total= 51
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Cooler water — back toward the 10–18 °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