Freestone · Mixed · New Mexico

Rio de los Pinos (NM/CO border)

Rio de los Pinos (NM/CO border) terrain map

The Rio de los Pinos is one of those quiet little border streams that crosses and re-crosses the New Mexico–Colorado line, winding through meadow and rincon country with the Cumbres & Toltec railroad somewhere up the valley.

Prime · Brown Trout
Chubby Chernobyl · 6-10
Primelive now
About as good as it gets
Low and clear — careful approach country. Take your time — read the water before you cast.
75% confidence
What moved it
  • LevelLight rain recentlyNo gauge reading
  • Water temp10.5°C
  • ClarityClear
Today's fly
Chubby Chernobyl
Chubby Chernobyl6-10
High-confidence seasonal pick
Conditions on the water
Estimate
Level
Light rain recently
No gauge reading
Water temp10.5°C
ClarityClear
Weather10°C
WindW 6 km/h
Pressure1021 hPa
Rain · recent6.6 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
11°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 right today, though insect activity could be better.
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

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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.
  • The river crosses the NM/CO state line repeatedly — applicable regulations and the required licence change with the bank, so verify reaches and rules against NMDGF (and Colorado where relevant) before fishing
  • A Habitat Stamp is required on USFS/BLM land in New Mexico
  • Access is mixed public/private; confirm legal access first.
What's coming
Plan ahead
5-day outlook
Other water nearby · 2
About this water

The Rio de los Pinos is one of those quiet little border streams that crosses and re-crosses the New Mexico–Colorado line, winding through meadow and rincon country with the Cumbres & Toltec railroad somewhere up the valley. It's small water, wild browns with cutthroat and cutbows in the colder reaches, and it asks for the same things every good small stream does: a light line, a careful approach, and the patience to fish the likely lies rather than thrash the whole pool. Access is a genuine puzzle here — the river threads through a mix of public, private and cross-border land, so it pays to work out exactly where you can legally fish before you go. Once snowmelt drops in early summer it's a lovely dry-dropper river, and the autumn fishing is quieter still. A small, honest stream for anglers who like to earn it.

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

EPA ATTAINS assessment unit 'Rio de los Pinos (New Mexico reaches)' (NM-2120.A_900), 2024 Integrated Report. Aquatic Life use: Not Supporting. Listed impairment causes: Temperature, 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) · NM-2120.A_900

The full read · show the working · for Brown Trout · confidence 75%
How the 83 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity48 × 12%5.8
Conditions total= 83
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