Freestone · Mixed · Colorado

Conejos River (Antonito / Platoro)

A sunlit stretch of the Conejos River lined with willows and cottonwoods in southern Colorado.

The Conejos is southern Colorado's quiet classic, a freestone tumbling out of the South San Juans down through canyon and meadow toward Antonito, and it has exactly the small-water dry-fly character the famous rivers have mostly lost.

Marginal · Brown Trout
Parachute Adams · 12-18
Marginallive now
Slow going — pick your moments
River temperature is the limiting factor today, not the flow. Fish dawn or dusk if you go at all, and handle everything with extra care.
80% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp19.1°C
  • ClarityClear
Today's fly
Parachute Adams
Parachute Adams12-18
High-confidence seasonal pick
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp19.1°C
ClarityClear
Weather24°C
WindE 13 km/h
Pressure1017 hPa
Rain · recent0.4 mm
Rain · ahead0.1 mm

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

Water temperature for Brown Trout
Warm — slow
19°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
Water at 19.1°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

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

See the full sub-surface read with Pro.

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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 Green DrakeHatch
2
2
Flav (Small Western Green Drake)Hatch
2
3
2
Mahogany DunHatch
2
2
American March BrownHatch
2
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
  • Wild-trout special-regulation sections (flies/lures, C&R) — verify CPW rules.
What's coming
Plan ahead
5-day outlook
Water here around 19°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. A sunlit stretch of the Conejos River lined with willows and cottonwoods in southern Colorado.
    Conejos River
  2. Terrain map of the venue
    Terrain map
About this water

The Conejos is southern Colorado's quiet classic, a freestone tumbling out of the South San Juans down through canyon and meadow toward Antonito, and it has exactly the small-water dry-fly character the famous rivers have mostly lost. Browns and rainbows that still eat an attractor with enthusiasm, and a fraction of the crowd. It's a post-runoff summer river — caddis, stoneflies, and hoppers once it drops and clears — with native Rio Grande cutthroat and brookies waiting up in the high tributaries for anyone willing to climb. One of the best 'Colorado without the scrum' picks in the state.

  • Mixed
Conservation note

Rio Grande cutthroat and brook trout in the high headwater tributaries above the main fishery (conservation/high-country, prose only). The Mogote reach is a brown/rainbow fishery.

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

EPA ATTAINS assessment unit 'Conejos River, mainstem and all tributaries' (CORGAL14a_C), 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) · CORGAL14a_C

The full read · show the working · for Brown Trout · confidence 80%
How the 33 is built — score × weight = contribution
Temperature38 × 28%10.6
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity62 × 12%7.4
Conditions total= 64
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
Directions
Seasons & zones
  • Trout1 January31 December
Related guides
Booking & contacts