Stillwater · Peat · West Lothian

Harperrig Reservoir

Wide view across Harperrig Reservoir towards East Cairn Hill in the Pentland Hills

A high, exposed Scottish Water reservoir on the West Lothian flank of the Pentlands, ten minutes off the A70 and a world away from everything.

Fair · Trout
Kate McLaren · 12-14
Fairlive now
Reasonable summer fishing likely at Harperrig Reservoir
Water temperature is the limiting factor today, not the wave. Fish dawn or dusk if you go at all, and handle everything with extra care.
60% confidence

Harperrig Reservoir is often best in spring through autumn.

What moved it
  • WindSW 16 km/hGentle breeze
Today's fly
Kate McLaren
Kate McLaren12-14
Retrieve, in the film
Conditions on the water
Live gauge
Wind
Gentle breeze
SW 16 km/h
N
SW
from the south-west
Wave20 cm ripple
Water temp
Air temp24°C
CloudOvercast
Pressure1019 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Trout
When
Late April to June and September
Where
Start with Marabou Damsel (8-12) — on the point. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A

Start with Marabou Damsel (8-12) — on the point. If that does not produce, switch depth or speed before changing the pattern entirely.

Plan B

Fish early and late, try deeper during the heat of the day with a fast-sinking line.

Watch for

Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.

Bank

Bank-only venue. Fish from accessible margins, points, weed edges, and inflows.

Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 5 with Pro.

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Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
1
Daphnia SwarmHatch
2
3
3
3
2
Daddy Long LegsHatch
2
3
2
Lake OliveHatch
2
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
2
2
2
1

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

Ranked for today
Trout fly box
What's coming
Plan ahead
5-day outlook
Condition match
49%
Cloud50%
Wind65%
Temp25%

Conditions are away from Harperrig Reservoir's sweet spot — it usually fishes best in ripple wind with cloud skies.

Other water nearby · 5
Gallery · 2
  1. Wide view across Harperrig Reservoir towards East Cairn Hill in the Pentland Hills
    Harperrig Reservoir, West Lothian
  2. Terrain map of the venue
    Terrain map
About this water

A high, exposed Scottish Water reservoir on the West Lothian flank of the Pentlands, ten minutes off the A70 and a world away from everything. Wild brown trout run the place, with some modest stocking on top, and the fish here have the small-headed look of browns that have worked for a living. Fly only. Bank fishing mostly; the wind decides whether a boat is a good idea or a bad one, and most days it has an opinion. Harperrig is the reservoir you come to when you want to be alone with the hills and the water and the occasional buzzard, and to catch trout that have not been photographed by anyone else this week.

  • Reservoir
  • Peat
Why this score
  • Daddy longlegs are in their seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
  • Trout 15 March6 October
Related guides
Casting instructors near here
Booking & contacts