Minnesota DNR fisheries surveys · latest June 22, 2021
Riley Lake FishingAWater-quality grade A
Minnesota DNR surveys at Riley Lake average 6.92 northern pike per unit of sampling effort (CPUE) across 10 surveys. The most recent is a Standard Survey dated June 22, 2021. Length samples in the latest survey that recorded them ran 14–38 inches. In Hennepin County, Minnesota, Riley Lake carries an overall water-quality grade of A. Water clarity averages 11.5 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 Riley Lake
11 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 Riley 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 Riley 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 Riley Lake average 6.92 northern pike per unit of sampling effort (CPUE) across 10 surveys. The most recent is a Standard Survey dated June 22, 2021. Length samples in the latest survey that recorded them ran 14–38 inches.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Riley Lake A from EPA Water Quality Portal chemistry, and the water-quality trend over 6 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
10 surveys on file from MN DNR Fisheries. Most recent: 2021-06-22 (Standard Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| Black Bullhead | 48.32 | 0.54 lb |
| Bluegill | 34.44 | 0.21 lb |
| Black Crappie | 15.82 | 0.24 lb |
| Yellow Perch | 13.72 | 0.13 lb |
| Brown Bullhead | 7.89 | 0.71 lb |
| Northern Pike | 6.92 | 3.95 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.
Black Bullhead
Bluegill
Black Crappie
Yellow Perch
From the 2021-06-22 survey
Lake Riley is a 296-acre lake with a maximum depth of 49 feet. The lake is located west of Eden Prairie, and Walleye are stocked each year by the lake association. During the summer of 2021, water clarity was neither extremely high nor extremely low, and the lake held good levels of dissolved oxygen to a depth of 32…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Riley Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — RileyFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — RileyFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — RileyPublic Water Access Sites · MN DNR LakeFinder
Common questions
What fish are in Riley Lake?
Minnesota DNR surveys at Riley Lake average 6.92 northern pike per unit of sampling effort (CPUE) across 10 surveys. The most recent is a Standard Survey dated June 22, 2021. Length samples in the latest survey that recorded them ran 14–38 inches. Minnesota DNR lists 11 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 Riley Lake last surveyed?
The most recent fisheries survey on file for Riley Lake is dated June 22, 2021. 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 Riley Lake stocked?
Minnesota DNR publishes a stocking history for Riley 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 Riley Lake fishes?
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Riley Lake A from EPA Water Quality Portal chemistry, and the water-quality trend over 6 years of monitoring is declining. 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.
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