Minnesota DNR fisheries surveys · latest July 21, 2025
Upper South Long Lake FishingCWater-quality grade C
Minnesota DNR surveys at Upper South Long Lake average 19.39 largemouth bass per unit of sampling effort (CPUE) across 11 surveys. The most recent is a Standard Survey dated July 21, 2025. Length samples in the latest survey that recorded them ran 4–18 inches. In Crow Wing County, Minnesota, Upper South Long Lake carries an overall water-quality grade of C. Water clarity averages 6.0 feet of visibility, and there is one public boat landing. The survey figures on this page are Minnesota DNR's own; the water-quality grade comes from EPA Water Quality Portal samples. Neither is a forecast of today's bite.
Species recorded at Upper South Long Lake
16 species on the Minnesota DNR list for this lake. A species on the list has been recorded here; it does not mean it is catchable today or in every part of the lake.
Stocking at Upper South Long Lake
Minnesota DNR publishes a stocking history for this lake — which species went in, how many, and in which years. Read the years: a lake stocked in one year is not necessarily stocked in the next.
Getting on the water
1 public boat landing is recorded on Upper South Long Lake. Minnesota DNR lists the public access sites, including ramp type and parking, in the documents below.
Survey results in full
Minnesota DNR surveys at Upper South Long Lake average 19.39 largemouth bass per unit of sampling effort (CPUE) across 11 surveys. The most recent is a Standard Survey dated July 21, 2025. Length samples in the latest survey that recorded them ran 4–18 inches.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Upper South Long Lake C from EPA Water Quality Portal chemistry, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
11 surveys on file from MN DNR Fisheries. Most recent: 2025-07-21 (Standard Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| Largemouth Bass | 19.39 | 0.92 lb |
| Bluegill | 18.35 | 0.13 lb |
| Bluntnose Minnow | 10.90 | — |
| Walleye | 6.44 | 1.7 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE means more abundant in standardized sampling. This is not a weekly bite report.
Length Distributions
Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.
Largemouth Bass
Bluegill
Walleye
From the 2025-07-21 survey
Upper South Long is an 804 acre lake 10 miles southeast of the city of Brainerd in Crow Wing County. Walleye is the primary management species, with the lake being stocked every other year (odd years) with 283 pounds of fingerlings. When surplus Walleye fry are available, up to 300,000 may be stocked; this last…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Upper South Long Lake. 4 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — Upper South LongFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Upper South Long (0205)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — Upper South LongFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — Upper South LongPublic Water Access Sites · MN DNR LakeFinder
Common questions
What fish are in Upper South Long Lake?
Minnesota DNR surveys at Upper South Long Lake average 19.39 largemouth bass per unit of sampling effort (CPUE) across 11 surveys. The most recent is a Standard Survey dated July 21, 2025. Length samples in the latest survey that recorded them ran 4–18 inches. Minnesota DNR lists 16 species for the lake in total. Those are survey results, not a catch report: a net set on one date measures what was in that net.
When was Upper South Long Lake last surveyed?
The most recent fisheries survey on file for Upper South Long Lake is dated July 21, 2025. Survey intervals vary by lake and by species; a gap of several years between surveys is normal and does not mean the record is missing.
Is Upper South Long Lake stocked?
Minnesota DNR publishes a stocking history for Upper South Long Lake. It records which species were released, in what numbers and in which years — the source documents are linked further down this page. A lake can be stocked in some years and not others, so read the years rather than assuming an annual release.
Does the water-quality grade tell me how Upper South Long Lake fishes?
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Upper South Long Lake C from EPA Water Quality Portal chemistry, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Before you eat what you catch
A water-quality grade is not a consumption advisory. Mercury and PCB advice for Minnesota waters comes from MDH, and it is issued per species and per size class — a lake can grade well and still carry a meal limit on larger predator fish.
Where to stay near Upper South Long Lake
Top-rated places to stay near Upper South Long Lake
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