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Rating depth structure for brook trout.
Shared by DepthScout anglers. Exact spots stay private, always.
6-acre lake in Douglas County, Wisconsin. The lake tops out around 4 ft. The chart is a model: real shoreline, published maximum depth, interpolated in between. A planning tool, never a navigation product. Every species below gets its seasonal read from the same numbers driving the chart.
On the chart, Un Spring draws 6 acres inside 0.8 miles of shoreline. With a shoreline index of 2.3, this water is all arms and coves — edge habitat well beyond its acreage. The whole water is littoral — nothing here runs deeper than ~15 ft, so it's all weed-and-bait territory. You'll find it in Douglas County. For a second option, Whiteside Lake lies 1 mi south.
In spring, brook trout run shallow here, mostly 1 to 4 ft. Summer keeps them at 1 to 4 ft, and they winter in 1 to 4 ft. Deep basin is the standout, a deep basin at roughly 3 ft, rated prime for summer brook trout. Time it for early morning and the evening. You won't need more than a small spoon fished deep or a trolled lake-clear wobbler + worm most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 4 ft | dawn & dusk | Main-lake point (4 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 1 to 4 ft | dawn & dusk | Deep basin (3 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 1 to 4 ft | midday & dawn | Main-lake point (4 ft) | Small spoon (orange), Spinner |
| Winter | 1 to 4 ft | dawn | Deep basin (3 ft) | Small jigging spoon, Tungsten jig + plastic |
Count 3 structure marks on this chart. The deepest, Main-lake point, sits near 4 ft.
Season dates, license requirements, and size and bag limits for Wisconsin waters are set by the Wisconsin DNR — and special regulations can apply to Un Spring specifically, so confirm the current rules before you fish.
Check the official Wisconsin fishing regulations →
Un Spring is about 4 ft (1 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 brook trout on Un Spring. These come from the Wisconsin DNR's per-lake fish listing; where the DNR lists a group (panfish, catfish, trout) the specific species are resolved from Wisconsin's fish distribution by the lake's location, depth and habitat.
Deep basin is the top-rated area: a deep basin in about 3 ft of water that rates prime for brook trout in summer. Open the map above to see every rated spot for each species and season.
For brook 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 Un Spring is regulated by the Wisconsin DNR. Check the official Wisconsin regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Whiteside Lake 1 mi · Metzger Lake 2 mi · Rock Lake 2 mi · Flamang Lake 3 mi · Lund Lake 3 mi · Beauregard Lake 3 mi · Upper Ox Lake 3 mi · Swenson Lake 3 mi · Black Fox Lake 4 mi · Simms Lake 4 mi · Jack Pine Lake 4 mi · Mirror Lake 4 mi
See how Un Spring stacks up: best brook trout lakes in Wisconsin
More water nearby: Douglas County fishing maps (103 charts). Browse all Wisconsin fishing maps or 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.