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40-acre lake near Na h-Eileanan an Iar. The lake tops out around 16 ft. These contours are modeled — built from the real shoreline and the water's maximum depth — so read them as a guide, never as navigation. Here's the year, species by species, as the scoring engine sees it.
Traced from the shoreline, Loch an Iasgaich runs 40 acres with 2 miles of edge. With a shoreline index of 2.3, this water is all arms and coves — edge habitat well beyond its acreage. 96% of the surface is littoral (under ~15 ft), per the model — cover, weeds and forage water. Tip to tip the water measures near 0.6 mi with a 0.3-mi widest point. The water lies in Na h-Eileanan Siar. For a second option, Loch Leòdasaigh or Loch Leodsay lies 1 mi west.
Spring brown trout on Loch an Iasgaich hold shallow, usually 2 to 16 ft. Depth-wise the year is flat: 5 to 16 ft in summer, 2 to 16 ft once it turns cold. Put Break off the point first on the milk run — a drop-off near 7 ft that grades prime for summer. The feeding windows run after dark and early morning. The summer box starts with a spoon at the thermocline or a deep stickbait (night).
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 16 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 16 ft chart-limited; documented 25 to 60 ft | night & dawn | Break off the point (7 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 3 to 16 ft chart-limited; documented 5 to 30 ft | dusk & dawn | Main-lake point (8 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 2 to 16 ft chart-limited; documented 5 to 35 ft | dawn | Break off the point (7 ft) | Jigging spoon, Small stickbait (slow) |
In spring, european perch run shallow here, mostly 3 to 12 ft. Midsummer fish sit out in 5 to 16 ft before dropping to 5 to 16 ft for winter. Fall european perch concentrate at Deep basin, a prime-rated deep basin around 14 ft. Fish it in early morning and you'll meet the bite. You won't need more than a drop-shot micro plastics or a small crankbait (perch pattern) most summer days.
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 | Break off the point (7 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 5 to 16 ft chart-limited; documented 8 to 28 ft | dawn | Deep basin (14 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 5 to 16 ft chart-limited; documented 10 to 33 ft | midday | Deep basin (14 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 5 to 16 ft chart-limited; documented 12 to 33 ft | midday & dawn | Deep basin (14 ft) | Tungsten jig + maggots, Small balance jig |
In spring, northern pike run shallow here, mostly 2 to 8 ft. Summer pushes them deeper, 5 to 16 ft, and winter fish settle into 5 to 15 ft. Break off the point is the standout, a drop-off at roughly 7 ft, rated prime for fall northern pike. Time it for early morning and the evening. You won't need more than a bucktail or a weedless spoon over cabbage most summer days.
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 | open water | #5 inline spinner, Spoon (red/white) |
| Summer | 5 to 16 ft chart-limited; documented 8 to 20 ft | dawn & dusk | Break off the point (7 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 5 to 16 ft chart-limited; documented 6 to 18 ft | midday & dawn | Break off the point (7 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Main-lake point (8 ft) | Tip-ups, Large jigging spoon |
Count 4 structure marks on this chart. The deepest, Deep basin, sits near 14 ft.
Loch an Iasgaich is about 16 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 an Iasgaich. 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.
Deep basin is the top-rated area: a deep basin in about 14 ft of water that rates prime for european perch in fall. 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 Leòdasaigh or Loch Leodsay 1 mi · Loch Carabhat or Loch Caravat 1 mi · Loch Tormasad Beag 2 mi · Loch Tormasad 2 mi · Loch na Còinnich 2 mi · Loch ic Colla 2 mi · Loch a Bharpa 2 mi · Loch an t-Seasgain 3 mi · Loch na Coithir-Eileana 3 mi · Loch a Chladaich 3 mi · Loch nan Garbh Chlachan 3 mi · Loch Huna 3 mi
See how Loch an Iasgaich 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.