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7-acre stocked lake in the Anchorage area. ADF&G sonar-surveyed water with stocked rainbow trout and 1 more species. The lake tops out around 75 ft. The depth chart is built from real state fisheries GPS surveys, so the humps, channels and drop-offs you see are measured, not guessed. Every species below gets its seasonal read from the same numbers driving the chart.
Drawn out, this is 7 acres of water rimmed by 0.5 miles of bank. At index 1.4 the outline is almost a bowl — read the depth changes, not the shoreline. 22% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. The water lies in Anchorage Borough. Closest neighbour on DepthScout: Clunie Lake, 3 mi north of here.
In spring, rainbow trout run shallow here, mostly 5 to 20 ft. Midsummer fish sit out in 8 to 30 ft before dropping to 8 to 40 ft for winter. Spring rainbow trout concentrate at Shallow feeding flat, a good-rated feeding flat around 17 ft. Fish it in early morning and the evening and you'll meet the bite. You won't need more than a dodger + spoon (deep troll) or a flutter spoon most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Shallow feeding flat (17 ft) | Inline spinner (silver), Small spoon |
| Summer | 8 to 30 ft | dawn & dusk | Shallow feeding flat (17 ft) | Dodger + spoon (deep troll), Flutter spoon |
| Fall | 10 to 35 ft | dawn & dusk | open water | Casting spoon, Jerkbait over shoals |
| Winter | 8 to 40 ft | dawn | open water | Jigging spoon, Tube jig (white) |
Spring arctic char on Thompson Lake hold shallow, usually 4 to 15 ft. By summer they slide out to 20 to 60 ft, and by winter most fish are in 10 to 40 ft. The chart's best answer is Shallow feeding flat — feeding flat, 17 ft, good for spring. Prime time lands in early morning. The summer box starts with a jigging spoon vertical or a tube jig (smelt).
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | midday & dawn | Shallow feeding flat (17 ft) | Small casting spoon (silver/orange), Jerkbait (small) |
| Summer | 20 to 60 ft | dawn | open water | Jigging spoon vertical, Tube jig (smelt) |
| Fall | 8 to 30 ft | midday & dusk | open water | Casting spoon (orange/gold), Beadhead streamer |
| Winter | 10 to 40 ft | midday & dawn | open water | Jigging spoon (glow/silver), Tungsten jig + plastic |
Count 1 structure marks on this chart. The deepest, Shallow feeding flat, sits near 17 ft.
Season dates, license requirements, and size and bag limits for Alaska waters are set by the Alaska Department of Fish and Game — and special regulations can apply to Thompson Lake specifically, so confirm the current rules before you fish.
Check the official Alaska fishing regulations →
Thompson Lake is about 75 ft (23 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
Anglers target rainbow trout, arctic char on Thompson Lake.
Shallow feeding flat is the top-rated area: a feeding flat in about 17 ft of water that rates good for rainbow trout in spring. The map above holds the full rated-spot list for every species and season.
For rainbow trout, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Thompson Lake is regulated by the Alaska Department of Fish and Game. Check the official Alaska regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Clunie Lake 3 mi · Walden Lake 3 mi · Gwen Lake 3 mi · Lower Fire Lake 3 mi · Otter Lake 5 mi · Upper Six Mile Lake 6 mi · Beach Lake 6 mi · Fish Lake 8 mi · Spring Lake 8 mi · Triangle Lake 8 mi · Hillberg Lake 8 mi · Green Lake 8 mi
See how Thompson Lake stacks up: best rainbow trout lakes in Alaska · best arctic char lakes in Alaska
More water nearby: Anchorage Borough fishing maps (29 charts). Browse all Alaska fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. 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.