Crystal-clear limestone spring creek in the Cazorla-Segura-Las Villas Natural Park; superb wild brown trout; catch-and-release only.
- Limestone karst
Rules at a glance
- Free fishing
- Fly only
A proper day on the water
Low and clear — careful approach country. Stay small, stay accurate.
75% confidence in this read
Live now
Conditions on the water
Trends shown where the gauge supports them
Level
Dry recently
No gauge reading
Water temp
9.7°C
Estimated
Clarity
Clear
Air temp
11°C
Wind
NW 4 km/h
Calm
Pressure
1016 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
4.4 mm
Light rain · next 48h
Live readings — water temperature is an estimate where the gauge does not record it.
How to fish · for brown trout
The brief
When · where · method · kit
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
Good conditions. Clarity is favourable (95), Feeding time is weakest (45).
Hatches & runs
What's on, when
Twelve months at a glance
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Today's fly · curated pack
Top pattern + the box
6 patterns from this venue's curated pack
Detail · next 12h
Water temperature & rain
The two readings most likely to move the verdict
Water temperature for brown trout
Cool — slow10°C est.ideal 10–16°C
0°14°28°
Evidence
Why today scores what it does
6 factors, signed
- Temperature9428% weight
- Flow6022% weight
- Clarity9518% weight
- Feeding Time4513% weight
- Pressure807% weight
- Prey Activity4612% weight
About this water
Río Castril, end to end
Field guide · contributor-editedRío Castril · about
What this water is
Background · character · contributors
About this water
Río Castril · directions
How to get to the water
Directions
Río Castril · zones
Where the rules change
Seasons · zones · per-species rules
Seasons & zones
- Troutdurante los periodos hábiles (check current BOJA) → during the designated open period
Río Castril · permits
Licences, sorteo, the rules
Permits & access
Permit required — see local rules.
- Junta de Andalucía licence plus trout surcharge required
- Confirm the exact current coto status and any local method restrictions before travel.
Río Castril
Terrain map
Crystal-clear limestone spring creek in the Cazorla-Segura-Las Villas Natural Park; superb wild brown trout; catch-and-release only.
Species
A proper day on the water
Low and clear — careful approach country. Stay small, stay accurate.
75% confidence in this read
Water temperature for brown trout
Cool — slow10°C est.ideal 10–16°C
0°14°28°
Why this score · for brown trout
- Temperature9428% weight
- Flow6022% weight
- Clarity9518% weight
- Feeding Time4513% weight
- Pressure807% weight
- Prey Activity4612% weight
Conditions
Level
Dry recently
No gauge reading
Water temp
9.7°C
Estimated
Clarity
Clear
Air temp
11°C
Wind
NW 4 km/h
Calm
Pressure
1016 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
4.4 mm
Light rain · next 48h
Live readings — water temperature is an estimate where the gauge does not record it.
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
Good conditions. Clarity is favourable (95), Feeding time is weakest (45).
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Permits & access
Permit required — see local rules.
- Junta de Andalucía licence plus trout surcharge required
- Confirm the exact current coto status and any local method restrictions before travel.
Directions
About this water
Crystal-clear limestone spring creek in the Cazorla-Segura-Las Villas Natural Park; superb wild brown trout; catch-and-release only.
- Limestone karst
Seasons & zones
- Troutdurante los periodos hábiles (check current BOJA) → during the designated open period
Other water nearby · 5
Booking & contacts