Tailwater · Mixed · Colorado

Dolores River (below McPhee)

Aerial view of the Dolores River winding through a red-rock canyon in southwestern Colorado.

The Dolores below McPhee is the tailwater that should be one of the Southwest's best and too often isn't, because in dry years the reservoir keeps the water and the river below runs thin.

Prime · Brown Trout
Sparkle Dun · 14-18
Primelive now
About as good as it gets
River steady at a fishable height. On the feed top to bottom — start on the rises with a dry, drop a nymph if they stay down.
75% confidence
What moved it
  • Level0.79 m
  • Water temp10.3°C
  • ClarityClear
Today's fly
SD
Sparkle Dun14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.79 m
Water temp10.3°C
ClarityClear
Weather20°C
WindNE 12 km/h
Pressure1015 hPa
Rain · recent0.1 mm
Rain · ahead6.4 mm

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for Brown Trout
Ideal
10°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 working for you, but time of day is the limiting factor today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 3 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 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
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • Colorado licence
  • Quality water with special-regulation sections — verify CPW rules and current McPhee release.
What's coming
Plan ahead
5-day outlook
Other water nearby · 1
Gallery · 2
  1. Aerial view of the Dolores River winding through a red-rock canyon in southwestern Colorado.
    Dolores Recreational River, Colorado
  2. Terrain map of the venue
    Terrain map
About this water

The Dolores below McPhee is the tailwater that should be one of the Southwest's best and too often isn't, because in dry years the reservoir keeps the water and the river below runs thin. When the release is good it's a fine cold-water brown-and-rainbow fishery in red-rock canyon country; when it's bad it's a cautionary tale about how a tailwater lives or dies by what the dam lets through. This is a river where the release figure isn't background detail — it's the whole forecast. Check the flow before you make the long drive, and respect a stressed low-water year.

  • Mixed
Water quality · US Clean Water Act
  • Aquatic lifeImpaired
What this classification means

EPA ATTAINS assessment unit 'Dolores River, mainstem' (COSJDO04a_B), 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) · COSJDO04a_B

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 Time40 × 13%5.2
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
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Trout1 January31 December
Related guides
Booking & contacts