Tailwater · Mixed · Maine, US

Magalloway River

Magalloway River Below Aziscohos Dam in the Mountains of Western Maine
Today · Closed season
Czech Nymph
Forecast · Today
Closed season
Out of season. Try elsewhere.
90% projected
Today's fly
Czech Nymph
Czech Nymph
Conditions on the water · Today
Proxy gauge
Level
Steady
Proxy
via Connecticut Lakes / Upper Connecticut River
Water temp13.3°C
ClarityClear
Weather2°C
WindN 22 km/h
Pressure1016 hPa
Rain · recent14.8 mm
Rain · ahead0.0 mm

No gauge on this water — conditions are inferred from Connecticut Lakes / Upper Connecticut River. The trend transfers, the absolute level does not.

Water temperature for Brook Trout
Ideal
13°C est.ideal 10–16°C
0°14°28°

A dam sets this river's temperature, not the weather, so it can shift several degrees within hours when the release changes. It also warms as it runs away from the dam.

How to fish it · for Brook 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.
Likely species
Mayflies
Chironomids
Gammarids
Hatch timeline · todayPeak at 12:00

12:00(now) — Eastern Blue-Winged Olive

Stage: On emergersApproach: Emerger or dryActivity: 63%
Also:Black Midge21%
Peak emergence window5 food groups active

Peak activity at 12:00 — Eastern Blue-Winged Olive (Eastern Blue-Winged Olive, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 as a supporter.

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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
1
SulphurHatch
2
3
2
Trico (Eastern)Hatch
2
3
3
2
Eastern Blue-Winged OliveHatch
2
3
3
3
3
3
3
3
2
Eastern Summer BWO (Drunella)Hatch
2
3
3
2

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

Ranked for today
Fly box · Brook Trout
Local fly shops: New England Fly Co.
Permits & access
Permit required — see local rules.
  • Maine general law April 1–Sept 30 with fly-fishing-only / special-law reaches below Aziscohos — verify exact reaches against the Maine 2026 law book
  • DAM-RELEASE: flow set by Aziscohos releases — check Brookfield SafeWaters
  • CONSERVATION: remote native brook trout (a heat-sensitive char) — careful handling, no trophy framing, strong thermal restraint.
What's coming
Plan ahead
5-day outlook
Fishing better nearby · 3
Androscoggin River — Errol
19 km
83
Brook trout · Rainbow trout · Brown trout
Rapid River / Rangeley region
20 km
0
Brook trout
Connecticut Lakes / Upper Connecticut River
25 km
0
Brook trout · Rainbow trout · Brown trout
Gallery · 2
  1. Magalloway River Below Aziscohos Dam in the Mountains of Western Maine
  2. Terrain map of the venue
    Terrain map
Water quality · US Clean Water Act
  • Aquatic life: Not assessed
  • Fish consumption: Impaired
What this classification means

Fish consumption: Consumption advisory (Mercury) — fish for sport, not the table.

EPA ATTAINS assessment unit 'MAGALLOWAY RIVER' (NHRIV400010206-02), 2024 Integrated Report. Aquatic Life use: Insufficient Information. Listed impairment causes: 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) · NHRIV400010206-02

The full read · show the working · for Brook Trout · confidence 45%
How the 0 is built — score × weight = contribution
Temperature74 × 28%20.7
Flow55 × 22%12.1
Clarity15 × 18%2.7
Feeding Time55 × 13%7.2
Pressure75 × 7%5.3
Insect activity47 × 12%5.6
Limiting factor: Water is very coloured — too coloured for Brook Trout= 54
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Connecticut Lakes / Upper Connecticut Riverproxy
Prey activitymodelled from regional profilemodelled
What would change the calculation
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 April → 30 September
Related guides
Euro Nymphingsubsurface methods
Booking & contacts