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7-acre lake near Gwynedd. The lake tops out around 17 ft. This chart interpolates between a real shoreline and a known maximum depth. It will point you at likely water, but it is not a navigation product. Every species below gets its seasonal read from the same numbers driving the chart.
The drawn water covers 7 acres wrapped in 0.5 miles of bank. A shoreline index of 1.3 says round and simple: fish relate to depth changes here, not shoreline features. 88% of the surface is littoral (under ~15 ft), per the model — cover, weeds and forage water. Gwynedd claims this one. Llyn Conwy sits 2 mi northeast — the closest neighbouring chart.
Start shallow in spring: brown trout sit in 2 to 17 ft that time of year. They don't go far with the seasons — 5 to 17 ft covers summer, 2 to 17 ft covers winter. The spot to know is Break off the point, a drop-off in about 8 ft of water that rates prime for brown trout in summer. Warm-month bites cluster around after dark and early morning. Throw a spoon at the thermocline or a deep stickbait (night) 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 | 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) |
When the water first warms, european perch slide up into 3 to 12 ft. By summer they slide out to 5 to 17 ft, and by winter most fish are in 5 to 17 ft. If you only fish one area, make it Deep basin: a deep basin around 14 ft that scores prime in fall. In summer the feeding windows fall in early morning. Keep a drop-shot micro plastics or a small crankbait (perch pattern) 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 | 3 to 12 ft | midday & dawn | Break off the point (8 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 |
Spring northern pike on Llyn Gamallt Fach hold shallow, usually 2 to 8 ft. By summer they slide out to 5 to 17 ft, and by winter most fish are in 5 to 15 ft. The chart's best answer is Break off the point — drop-off, 8 ft, prime for fall. Prime time lands in early morning and the evening. The summer box starts with a bucktail or a weedless spoon over cabbage.
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 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 | Main-lake point (8 ft) | Tip-ups, Large jigging spoon |
Count 3 structure marks on this chart. The deepest, Deep basin, sits near 14 ft.
Llyn Gamallt Fach 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 Llyn Gamallt Fach. 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. Scroll up to the map for the complete spot list by 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.
Llyn Conwy 2 mi · Llynnau Barlwyd 3 mi · Llyn y Garn 4 mi · Llyn Arenig Fach 5 mi · Llyn Trawsfynydd 6 mi · Llyn Edno 6 mi · Llyn Llagi 6 mi · Llynau Diwaunedd 7 mi · Llyn Llenyrch 7 mi · Llyn Celyn 8 mi · Llyn Gwynant 8 mi · Llyn Tecwyn Isaf 9 mi
See how Llyn Gamallt Fach 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: Gwynedd fishing maps (35 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.