Minnesota DNR fisheries surveys · latest August 4, 1997
Ace Lake FishingNRNot rated for water quality
Minnesota DNR surveys at Ace Lake average 6.88 northern pike per unit of sampling effort (CPUE) across 1 survey. The most recent is a Standard Survey dated August 4, 1997. Length samples in the latest survey that recorded them ran 5–30 inches. In St. Louis County, Minnesota, Ace Lake has no letter grade — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Water clarity averages 8.0 feet of visibility. 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.
Stocking at Ace 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.
Survey results in full
Minnesota DNR surveys at Ace Lake average 6.88 northern pike per unit of sampling effort (CPUE) across 1 survey. The most recent is a Standard Survey dated August 4, 1997. Length samples in the latest survey that recorded them ran 5–30 inches.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality does not assign an A–F grade on Ace Lake — official chemistry is on file, not a letter, and the water-quality trend over 4 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1997-08-04 (Standard Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| White Sucker | 25.00 | 2.31 lb |
| Northern Pike | 6.88 | 2.73 lb |
| Yellow Perch | 4.46 | 0.12 lb |
| Walleye | 3.92 | 1.54 lb |
| Rock Bass | 2.67 | 0.57 lb |
| Pumpkinseed | 0.42 | 0.4 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.
White Sucker
Northern Pike
Yellow Perch
Walleye
From the 1997-08-04 survey
King is a 293 acre lake located 4 miles south of Rollins, MN off county #266. Stewart has difficult access from the Rossini Trail across a minimum maintenance road to the south side of the lake. Maximum depth is 8 feet and 99% of the lake is shallower than 15 feet. Walleye abundance indexed with assessment nets was…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Ace Lake. 2 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — KingFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — KingFish Stocking History · MN DNR LakeFinder
Common questions
What fish are in Ace Lake?
Minnesota DNR surveys at Ace Lake average 6.88 northern pike per unit of sampling effort (CPUE) across 1 survey. The most recent is a Standard Survey dated August 4, 1997. Length samples in the latest survey that recorded them ran 5–30 inches. Those are survey results, not a catch report: a net set on one date measures what was in that net.
When was Ace Lake last surveyed?
The most recent fisheries survey on file for Ace Lake is dated August 4, 1997. 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 Ace Lake stocked?
Minnesota DNR publishes a stocking history for Ace 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 Ace Lake fishes?
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality does not assign an A–F grade on Ace Lake — official chemistry is on file, not a letter, and the water-quality trend over 4 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 Ace Lake
Top-rated places to stay near Ace Lake
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