Freestone · Mixed · Slovakia / Horehronie (Low Tatras / Slovak Ore Mountains), SK

Hron (upper reaches)

The upper Hron river flowing past Brezno in central Slovakia on an overcast day

The upper Hron matters as both a fishery and a conservation story, rising in the Low Tatras and flowing through Horehronie around Brezno.

Good · Grayling
Pink Grayling Bug · Hook 16
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
  • Level0.79 mLast reading 9h ago
  • Water temp6.1°C
  • ClarityClear
Today's fly
Pink Grayling Bug
Pink Grayling BugHook 16
in season · matches water height · all-rounder
Conditions on the water
Live gauge
Level
Steady
0.79 m
Last reading 9h ago
Water temp6.1°C
ClarityClear
Weather5°C
WindN 5 km/h
Pressure1023 hPa
Rain · recent16.8 mm
Rain · ahead1.2 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Grayling
Ideal
6°C est.ideal 4–14°C
0°14°28°
How to fish it · for Grayling
When
Midday window — grayling feed best from late morning into early afternoon.
Where
Work runs and glides — grayling shoal in the bottom third of the water column.
Method
Tight-line nymph the bottom third with weighted patterns.
Kit
10 ft #3 rod, floating line, long leader to 4 lb fluoro for nymphs.
Why this works
Good — water temperature is working for you, but time of day is the limiting factor today. Grayling is active in the cooler margins of the season.
Hatch timeline · todayPeak at 10am

Hatch predictions

Today's headline hatch shown — see all 5 active hatches hour by hour as a supporter.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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Evidence
Records-basedModerate confidence

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

Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
1
Grayling seasonSeason
1
2
2
2
2
2
1
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1

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

Ranked for today
Grayling fly box

Broad mountain-river trout and grayling pack with brown trout at the centre, but room for rainbow and brook trout where present.

Small Perdigón
Small Perdigón
Hook 14–18 · Fly
in season · matches water height
Permits & access
Permit required — see local rules.
  • State fishing licence/card (rybársky lístok) plus a local or SRZ-area permit for the specific waters
  • Guest access is possible through local associations and SRZ-linked structures, but exact permit format and duration should be checked water by water.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Váh (upper / Liptov)
38 km
Brown trout · Rainbow trout · Grayling
Belá
42 km
Brown trout · Grayling
Orava
55 km
Brown trout · Grayling
Turiec
56 km
Brown trout · Grayling
Poprad (Slovakia)
59 km
87
Brown trout · Rainbow trout · Grayling
Gallery · 2
  1. The upper Hron river flowing past Brezno in central Slovakia on an overcast day
    The Hron River near Brezno
  2. Terrain map of the venue
    Terrain map
About this water

The upper Hron matters as both a fishery and a conservation story, rising in the Low Tatras and flowing through Horehronie around Brezno. It is one of the rivers where the Living Rivers restoration project focuses on ecological improvement. Brown trout and grayling in mountain and submontane water. Mixed geology from crystalline Low Tatras to the metalliferous Slovak Ore Mountains. Technical nymphing and dry-fly fishing.

  • Mixed
The full read · show the working · for Grayling · confidence 75%
How the 79 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time25 × 13%3.3
Pressure80 × 7%5.6
Insect activity33 × 12%4.0
Conditions total= 74
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
Apple MapsGoogle Maps
Seasons & zones
  • Trout 16 April → 30 September
  • Grayling 1 June → 31 December
Related guides
Grayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts