Freestone · Mixed · Colorado

Arkansas River — Browns Canyon (Buena Vista to Salida)

The Arkansas River flowing through a rocky streambed at sunset in Browns Canyon National Monument, Colorado, with pink and orange clouds reflected on the water.

Browns Canyon is the reach the caddis built — the Mother's Day hatch comes up the river in late April and May and the brown trout lose their manners for a couple of weeks, which is most of the reason people circle this water on the calendar.

Good · Rainbow Trout
Parachute Adams · 12-18
Goodlive now
A proper day on the water
River steady at a fishable height. A proper day for it. Work the seams with an upstream nymph, switch to the dry when they show.
75% confidence
What moved it
  • Level1.00 mLast reading 23h ago
  • Water temp16.6°C
  • ClarityClear
Today's fly
Parachute Adams
Parachute Adams12-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
1.00 m
Last reading 23h ago
Water temp16.6°C
ClarityClear
Weather17°C
WindE 9 km/h
Pressure1019 hPa
Rain · recent3.0 mm
Rain · ahead5.7 mm

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

Water temperature for Rainbow Trout
Ideal
17°C est.ideal 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
Good — 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 5 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 2 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 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
Rainbow Trout fly box
Permits & access
Permit required — see local rules.
  • Colorado licence
  • Gold Medal reach
  • Verify CPW rules.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
  1. The Arkansas River flowing through a rocky streambed at sunset in Browns Canyon National Monument, Colorado, with pink and orange clouds reflected on the water.
    Browns Canyon National Monument
  2. Terrain map of the venue
    Terrain map
About this water

Browns Canyon is the reach the caddis built — the Mother's Day hatch comes up the river in late April and May and the brown trout lose their manners for a couple of weeks, which is most of the reason people circle this water on the calendar. It's classic, accessible, wadeable freestone through Buena Vista and Salida, and it gets a crowd because it earns one. The catch is summer: this is also one of Colorado's busiest commercial whitewater runs, so a perfect hydrograph in July might still mean dodging rafts all afternoon. Fish the mornings.

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

EPA ATTAINS assessment unit 'Arkansas River, mainstem' (COARUA03_A), 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) · COARUA03_A

The full read · show the working · for Rainbow Trout · confidence 75%
How the 78 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time40 × 13%5.2
Pressure75 × 7%5.3
Insect activity55 × 12%6.6
Conditions total= 78
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