Fisheries Lake Survey

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Name: Fish Trap

Nearest Town: Lincoln
Primary County: Morrison
Survey Date: 08/09/2010
Inventory Number: 49013700
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Public Access Information

Ownership Type Description
DNR Concrete State owned access on NW side of lake.

Fishing Regulations:

Special and/or Experimental Fishing Regulations exist on this lake. Please refer to our online Minnesota Fishing Regulations.

Lake Characteristics

Lake Area (acres): 1174.52
Littoral Area (acres): 404
Maximum Depth (ft): 42
Water Clarity (ft): 13.3 (9.6-17)

Dominant Bottom Substrate: N/A
Abundance of Aquatic Plants: N/A
Maximum Depth of Plant Growth (ft): 14.9 (5-19)

Did you know? MinnAqua Fishing: Get in the Habitat! has a Minnesota-base activity guide for teachers, scout and 4-H leaders, youth leaders, outdoor sports groups, or anyone interested in teaching others about habitat, stewardship and fishing.

Fish Sampled for the 2010 Survey Year


Gear Used

Number of fish per net

Average Fish Weight (lbs)

Normal Range (lbs)


Normal Range

Black Crappie Gill net 1.08 0.5 - 2.7 0.62 0.2 - 0.4
Bluegill Gill net 15.25 N/A 0.16 N/A
Brown Bullhead Gill net 0.08 0.3 - 2.2 1.17 0.6 - 1.0
Hybrid Sunfish Gill net 0.08 N/A 0.15 N/A
Largemouth Bass Gill net 0.17 0.3 - 1.2 0.56 0.5 - 1.1
Northern Pike Gill net 12.08 3.1 - 8.5 2.39 1.5 - 2.7
Pumpkinseed Gill net 1.67 N/A 0.20 N/A
Rock Bass Gill net 1.92 0.3 - 2.0 0.41 0.3 - 0.5
Tullibee (cisco) Gill net 0.50 0.7 - 6.5 0.43 0.6 - 1.6
Walleye Gill net 5.00 1.3 - 5.5 1.65 1.2 - 2.4
White Sucker Gill net 0.33 0.5 - 3.5 1.66 1.6 - 2.4
Yellow Bullhead Gill net 3.00 0.9 - 10.0 0.99 0.5 - 0.7
Yellow Perch Gill net 11.75 2.5 - 24.2 0.11 0.1 - 0.2
Normal Ranges represent typical catches for lakes with similar physical and chemical characteristics.

Length of Selected Species (Trapnet, Gillnet) Sampled for the 2010 Survey Year

Species Number of fish caught in each category (inches)
0-5 6-8 9-11 12-14 15-19 20-24 25-29 30+ Total
black crappie 0 1 12 0 0 0 0 0 13
bluegill 102 76 0 0 0 0 0 0 183
brown bullhead 0 0 0 1 0 0 0 0 1
hybrid sunfish 1 0 0 0 0 0 0 0 1
largemouth bass 1 0 0 1 0 0 0 0 2
northern pike 0 0 0 6 48 66 15 10 145
pumpkinseed 9 11 0 0 0 0 0 0 20
rock bass 3 15 5 0 0 0 0 0 23
tullibee (cisco) 0 0 5 1 0 0 0 0 6
walleye 0 7 9 10 21 10 2 0 60
white sucker 0 0 0 1 3 0 0 0 4
yellow bullhead 0 0 18 18 0 0 0 0 36
yellow perch 64 73 0 0 0 0 0 0 141

For the record, the largest White Bass taken in Minnesota weighed 4 lbs., 2.4 oz. and was caught:

    Where: Mississippi River Pool 5, Wabasha County
    When: 5/4/2004

Fish Stocking Activity

Fish Stocked by Species for the Last Ten Years

Year Species Size Number Pounds
2012 Walleye fry 1,200,000 10.6
2011 Walleye fry 1,200,000 10.9
2010 Walleye fingerlings 12,006 667.0
2009 Walleye fry 1,200,000 12.0
2008 Walleye fingerlings 12,036 572.0
2007 Walleye fry 1,200,000 12.0
2006 Walleye fingerlings 37,065 483.0
2004 Walleye yearlings 116 38.0
  Walleye fry 1,200,000 12.0
  Walleye fingerlings 30,551 716.0
  Walleye adults 52 74.0

Privately Stocked Fish
* indicates privately stocked fish. Private stocking includes fish purchased by the DNR for stocking and fish purchased and stocked by private citizens and sporting groups.

Stocking Fish Sizes
Fry - Newly hatched fish that are ready to be stocked usually called "swim-ups". Walleye fry are 1/3 of an inch or around 8 mm.
Fingerling - Fingerlings are one to six months old and can range from a size of one to twelve inches depending on the species. Walleye fingerlings range from three to eight inches each fall.
Yearling - Yearling fish are at least one year old. A one-year-old fish can range from three to twenty inches depending on the species. Walleye yearlings average from six to twelve inches.
Adult - Adult fish are fish that have reached maturity. Depending on the species, maturity can be reached at two years of age. Walleye reach maturity between the ages of four and six years.

Fish Consumption Guidelines

These fish consumption guidelines help people make choices about which fish to eat and how often. Following the guidelin es enables people to reduce their exposure to contaminants while still enjoying the many benefits from fish.

Pregnant Women, Women who may become pregnant and Children under age 15

County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
Morrison Co., 49013700
Crappie All sizes        
Northern Pike   All sizes     Mercury
Walleye   All sizes     Mercury
White Sucker   All sizes     Mercury

General Population

County, DOWID
Species Meal Advice Contaminants
Unrestricted 1 meal/week 1 meal/month Do not eat
Morrison Co., 49013700
Crappie All sizes        
Northern Pike All sizes        
Walleye All sizes        
White Sucker All sizes        

DOWID - MN DNR, Division of Waters' lake ID number.

Contaminants listed were measured at levels that trigger advice to limit consumption.

Listing of consumption guidelines do not imply the fish are legal to keep, MN DNR fishing regulations should be consulted.

PCBS - Polychlorinated biphenyls
PFOS - Perfluorooctane sulfanate

Status of the Fishery (as of 08/09/2010)

Fish Trap Lake is a popular recreational lake in northwest Morrison County. The many bays and islands offer scenic variety, some seclusion, and fishing hot spots. Water clarity was excellent with a secchi disk reading of 17 feet in mid-August. The lake supports a diverse fish community that attracts anglers with the management focus on walleye, northern pike, largemouth bass, black crappie, and bluegill. An experimental northern pike regulation was implemented in 2003 which put a protected slot on fish between 24 and 36 inches. The possession limit is still three, one of which can be over 36 inches. The objective of the regulation was to increase the quality of the northern pike population size structure. Walleye abundance showed little change from the last survey. While the net catch rate was normal when compared to similar type lakes it was below the lake management goal. Anglers have a wide range of sizes available to them as fish from seven to 26 inches were recorded in the survey. Over half of the fish caught were between 12 and 20 inches in length. Although there has been some natural reproduction documented, fry and fingerling stockings have helped to sustain the population and fishery. Northern pike were the only species to show a significant change in abundance since the last survey. Pike have increased, however, despite the increased abundance, there was an apparent improvement in population size structure. Average size was almost 2.5 pounds and there were more fish over both 24 and 30 inches observed. The largest northern pike caught was just over 35 inches indicating the lake has the potential to produce trophy size fish. Fish Trap Lake has a good largemouth bass population in both size and abundance. The multitude of weedy shallow bays and irregular shoreline provides excellent habitat for the species. The 2010 spring electrofishing effort had one of the higher catches of the year for the area and sampled fish up to almost nineteen inches. While most of the bass were in the 12 to 14 inch range, there were fair numbers between 14 to 17 inches. Muskellunge are one species that more anglers are seeing in Fish Trap Lake. These fish likely migrated in from Lake Alexander. Although no muskellunge were caught in the summer survey, two over 40 inches were netted in the spring electrofishing and more were observed. Panfish species in the lake include bluegill, black crappie, hybrid sunfish, pumpkinseed sunfish, and rock bass. The bluegill average size in the summer survey was under six inches, but there were fish up to nine inches measured. Crappie provide a popular ice fishing opportunity in the area. While crappie can sometimes be difficult to catch in summer surveys, results from the 2010 survey suggest normal abundance for this type of lake. Most of the crappie caught in the summer survey would be considered keepers by most anglers. While hybrid sunfish, pumpkinseed, and rock bass are typically not as desirable to fishermen as bluegill and crappie, some nicer pumpkinseed and rock bass were observed. Yellow perch numbers were better in the 2010 survey which may benefit the gamefish populations. Perch can be an important food species for gamefish which promotes good growth rates in those species. Fish Trap Lake also has tullibee or cisco although the population appears to be low. Two species of bullhead, brown and yellow, were caught with the yellow being the most abundant. Quality size fish over 13 inches were measured in both species. White sucker are also in the lake which should provide an additional food source for the larger northern pike, walleye, and muskellunge. Smallmouth bass are another species that likely migrated in from Lake Alexander. Although none were sampled in any of the 2010 assessments on Fish Trap Lake, they have been sampled in previous assessments. Protecting and preserving the shoreline as well as the near shore habitats should be a high priority of lakeshore owners and the county. Doing so will help protect the water quality and provide fish and wildlife habitat in and around the lake. Best shoreline and watershed management practices such as limiting vegetation removal are encouraged. Emergent vegetation provides wildlife and fish habitat as well as reduces shoreline erosion from high water and boat wakes. Buffer strips along inlets and lakeshore property are encouraged to reduce nutrients entering the water thus slowing algae and excess weed growth. Fishermen and recreational boaters are reminded to diligently clean their boats and trailers before moving betweens lakes to prevent the spread of exotics.

For more information on this lake, contact:

Area Fisheries Supervisor
16543 Haven Rd
Little Falls, MN 56345
Phone: (320) 616-2450
Internet: Little Falls Fisheries

Lake maps can be obtained from:

Minnesota Bookstore
660 Olive Street
St. Paul, MN 55155
(651) 297-3000 or (800) 657-3757
To order, use B0213 for the map-id.

For general DNR Information, contact:

DNR Information Center
500 Lafayette Road
St. Paul, MN 55155-4040
TDD: (651) 296-6157 or (888) MINNDNR

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