Sign inSign up free Sign inSign up free Sign inSign up freeLake depth chart
Today's read
Rating depth structure for brook trout.
Shared by DepthScout anglers. Exact spots stay private, always.
5-acre lake in Washburn County, Wisconsin. The lake tops out around 15 ft. Bathymetry on this water is estimated from its real outline and maximum depth. Use it to shortlist water, then verify with your electronics — and never navigate by it. Here is how the season plays out for each species, straight from the data behind the map.
The drawn water covers 5 acres wrapped in 0.7 miles of bank. With a shoreline index of 2.3, this water is all arms and coves — edge habitat well beyond its acreage. It sits in Washburn County. Its nearest charted neighbour, Spring Lake, is 1 mi to the northwest.
When the water first warms, brook trout slide up into 2 to 15 ft. There's no big seasonal slide here — summer means 5 to 15 ft, winter 2 to 15 ft. If you only fish one area, make it Deep basin: a deep basin around 13 ft that scores prime in summer. In summer the feeding windows fall in early morning and the evening. Keep a small spoon fished deep or a trolled lake-clear wobbler + worm rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 15 ft | dawn & dusk | Main-lake point (8 ft) | Small inline spinner (gold), Tiny spoon |
| Summer | 5 to 15 ft | dawn & dusk | Deep basin (13 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Fall | 2 to 15 ft | midday & dawn | Main-lake point (8 ft) | Small spoon (orange), Spinner |
| Winter | 2 to 15 ft | dawn | Deep basin (13 ft) | Small jigging spoon, Tungsten jig + plastic |
Count 2 structure marks on this chart. The deepest, Deep basin, sits near 13 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 15 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 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 13 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.
Spring Lake 1 mi · Scovils Lake 2 mi · Lake Nancy 2 mi · Warner Lake 2 mi · Beartrack Lake 2 mi · Lower Kimball Lake 2 mi · Middle Kimball Lake 3 mi · No Mans Lake 3 mi · Bradley Lake 3 mi · Upper Kimball Lake 3 mi · Banks Lake 3 mi · Sand Lake 3 mi
See how Un Spring stacks up: best brook trout lakes in Wisconsin
More water nearby: Washburn County fishing maps (210 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.