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172-acre lake near Na h-Eileanan an Iar. The lake tops out around 17 ft. What you see is a modeled chart: the shoreline is real, the max depth is published, and the contours between are estimated. Plan with it; don't navigate by it. Here's the year, species by species, as the scoring engine sees it.
Drawn out, this is 172 acres of water rimmed by 6.1 miles of bank. That shoreline is heavily fingered (development index 3.3) — bays, points and pockets everywhere, which multiplies the fishable edge. Roughly 92% of the water is 15 ft or less as modeled, the band where the food chain lives. Tip to tip the water measures near 1.7 mi with a 0.6-mi widest point. You'll find it in Na h-Eileanan Siar. The nearest mapped water is Loch Aird a Mhuile or Loch Ardvule, 3 mi to the southwest.
When the water first warms, brown trout slide up into 2 to 17 ft. There's no big seasonal slide here — summer means 5 to 17 ft, winter 2 to 17 ft. If you only fish one area, make it Break off the point: a drop-off around 8 ft that scores prime in summer. In summer the feeding windows fall in after dark and early morning. Keep a spoon at the thermocline or a deep stickbait (night) rigged through the warm months.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 17 ft chart-limited; documented 3 to 25 ft | dawn & dusk | Main-lake point (8 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 5 to 17 ft chart-limited; documented 25 to 60 ft | night & dawn | Break off the point (8 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 3 to 17 ft chart-limited; documented 5 to 30 ft | dusk & dawn | Main-lake point (8 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 2 to 17 ft chart-limited; documented 5 to 35 ft | dawn | Break off the point (8 ft) | Jigging spoon, Small stickbait (slow) |
Start shallow in spring: european perch sit in 3 to 12 ft that time of year. Summer pushes them deeper, 5 to 17 ft, and winter fish settle into 5 to 17 ft. The spot to know is Shallow bay flat, a weed flat in about 3 ft of water that rates prime for european perch in spring. Warm-month bites cluster around early morning. Throw a drop-shot micro plastics or a small crankbait (perch pattern) until the fish tell you otherwise.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (3 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 5 to 17 ft chart-limited; documented 8 to 28 ft | dawn | Deep basin (14 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 5 to 17 ft chart-limited; documented 10 to 33 ft | midday | Deep basin (14 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 5 to 17 ft chart-limited; documented 12 to 33 ft | midday & dawn | Deep basin (14 ft) | Tungsten jig + maggots, Small balance jig |
The spring pattern is a shallow one: northern pike in 2 to 8 ft. Midsummer fish sit out in 5 to 17 ft before dropping to 5 to 15 ft for winter. The spot to know is Shallow bay flat, a weed flat in about 3 ft of water that rates prime for northern pike in spring. Plan around early morning and the evening in the warm months. Summer baits: a bucktail or a weedless spoon over cabbage gets it done.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (3 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 5 to 17 ft chart-limited; documented 8 to 20 ft | dawn & dusk | Break off the point (8 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 5 to 17 ft chart-limited; documented 6 to 18 ft | midday & dawn | Break off the point (8 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (3 ft) | Tip-ups, Large jigging spoon |
6 pieces of structure are mapped here — Deep basin, around 14 ft, is the deepest of them.
Loch Olaidh Meadhanach or Loch Ollay is about 17 ft (5 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target brown trout, european perch, northern pike on Loch Olaidh Meadhanach or Loch Ollay. This isn't a survey of the water — none is published for it — but an informed estimate from the species common to the region, narrowed by this water's depth, size and each species' range.
Shallow bay flat is the top-rated area: a weed flat in about 3 ft of water that rates prime for european perch in spring. The map above holds the full rated-spot list for every species and season.
For brown trout, the summer bite is best in after dark and early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Loch Aird a Mhuile or Loch Ardvule 3 mi · Loch Aird an Sgairbh 3 mi · Loch Druidibeag or Loch Druidibeg 5 mi · Loch na Cuithe Mòire 5 mi · Loch Airigh na h-Achlais 6 mi · Loch Teanga 6 mi · unnamed 8 mi · Loch an Eilean 9 mi · Loch Chearsanais or Loch Kearsinnish 10 mi · Loch Langabhat or Loch Langavat 12 mi · Loch Shiùrabhagh 13 mi · Loch Theirmeadail or Loch Hermidale 14 mi
See how Loch Olaidh Meadhanach or Loch Ollay stacks up: best northern pike lakes in United Kingdom · best european perch lakes in United Kingdom · best brown trout lakes in United Kingdom
More water nearby: Na h-Eileanan Siar fishing maps (84 charts). Browse all United Kingdom fishing maps. See every water on DepthScout. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.