Manitowoc County Lakes Association

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Harpt Lake

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Harpt Lake News

Harpt Lake
by Dan Dufek
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Click on the maps to enlarge. Bathymetric Map Courtesy of and Copyright Sportsman’s Connection, based on Wisconsin DNR data. Watershed map courtesy of Manitowoc County Soil and Water Conservation Department. New! Zoom in even closer with this new interactive watershed mapping tool.  

MCLA Lake Director: Dan Dufek

Location/Directions: North Lake Road, Town of Gibson. Take Interstate 43 North from Manitowoc to STH 147, East on STH 147 approximately 3 miles to Harpt Lake Road. North on Harpt Lake Road 1.75 miles to North Lake Road. West .2 miles to landing.

About Harpt Lake

Lake Health


  • Features: Parking for 4 car/trailer units is provided at the public access to this 31 acre lake, which includes a boat launch and fishing pier. An additional boat launch ramp, fishing piers and swimming beach are located on the east side of the lake at the Larrabee Sportsman’s Club. Lighting present. No restrooms.
  • Nearby establishments: Larrabee Sportsman’s Club.
  • Boat Ramp: Concrete ramp, 8% slope, 3 ft launch depth, boarding dock.
  • Launch Fee: The daily fee is $5 and the seasonal fee is $20.
  • ADA Accessibility Features: No. Not ADA accessible.
  • Restrictions: Motor boats are permitted. Entire lake is “slow no-wake.”  Wisconsin boating handbook
  • Manitowoc County Map and Photos:


  • Surface Area: 31.4 acres
  • Depth: Max 54′, Mean 20′
  • Shorelength: unknown
  • Bottom: 5% sand, 20% gravel, 5% rock, 70% muck
  • Type of Lake: Deep Seepage. Deep Seepage lakes stratify, or form separate layers of water, during the summer months and have no inlet or outlet.
  • Lat/Long: 44.29593080, -87.73401710

Aquatic Invasive Species Threats


  • Fish present: Largemouth bass, bluegill, black crappie are common, and walleye are present.


  • View Harpt Lake fishing regulations on DNR website
  • Open All Year 
    • Panfish: 25/10 Year-Round (as of 4/1/2016). 25 panfish may be kept, but no more than 10 of any one species (all year). No minimum length limit.
      Panfish fact sheet
    • Catfish: Bag limit 10. No min length.
  • Open 5/4/2019-3/1/2020:
    • Largemouth/smallmouth bass: 14″ Limit 5.
    • Northern: No length limit, bag limit 5.
    • Walleye: 15″ Limit 5.
  • Motor Trolling is allowed with up to 3 hooks, baits, or lures, per angler.
  • Familiarize yourself with Wisconsin fishing:
    WDNR Hook & Line Guide
  • Consumption Advisory: General Manitowoc County/Mercury. Click here.

Stocking and DNR Surveys

     DNR Conclusions from 2019 Survey:

  • Largemouth Bass are the dominant gamefish. Population estimates indicate that the Bass population is likely between 546 to 1,360 Bass (1.6 to 43.9 per acre).

  • Walleye were caught in higher frequency in 2019 than during previous surveys. Population estimates are between 136 and 152 Walleye (4.4 to 4.9 per acre)

  • Northern Pike exhibit good growth with above Statewide average growth. Lack of abundant habitat will likely keep Pike number modest.

  • Bluegill continue to be the most abundant panfish. 2019 found reduced numbers of Bluegill with a size skewed toward 200 mm (8”) fish. Bluegill at all ages were on average, longer at each age than Statewide average.

  • Black Crappie will likely provide good angling during the next several years.

  • Yellow Perch were the least commonly captured panfish despite several stockings since 2015. Perch were able to obtain good size (>200 mm (8”)) but either anglers or poor survival limited the number of large Perch in the population.

     It is recommended to:

  • Halt DNR small fingerling Walleye stocking based on poor survival. Either DNR will stock extended growth Lake Michigan strain Walleye fingerlings or allow the Sportsmen’s Club to do all stocking of Lake Michigan strain Walleye extended growth.
  • Implement the recommendations from the ongoing Panfish Study when available to maintain a desirable panfish size distribution.
  • Encourage DNR, Manitowoc County and the Sportsmen’s Club to collectively find an alternate location for the public boat ramp or develop an off-road parking lot.

  • Continue to work with the local club to continue habitat projects on the lake including rock reefs and fish sticks.

  • Encourage land owners to implement recommendations found in their management plan to improve water quality by controlling runoff and exploring methods to reduce internal cycling of phosphorus.



Fish Stocking Data
Year Species Strain Age Class Number Stocked Average Length (inches)
2019 WALLEYE FINGERLING 1,995 1.9″


2018* WALLEYE FINGERLING 1,500 7-9″




*Not a DNR project. Stocked by volunteers of the Larrabee Sportsmen’s Club

View more history

Condition: GOOD (2018) Source

  • 5-Year Average Trophic State: 51/Eutrophic 
  • Secchi Disk (current data unavailable):
    The last secchi disk reading was taken in summer 2014. The average reading in 2014 was 8 ft., compared to the SE Georegion average of 6.6 ft.
  • Chemistry:
    Average summer Chlorophyll 7.2 µg/l (SE Georegion average 31.6 µg/l).
    Average summer Total Phosphorus 37.8 µg/l.
    Lakes that have more than 20 µg/l and impoundments that have more than 30 µg/l of total phosphorus may experience noticeable algae blooms.
  • Trophic State Index (TSI): 50/Mesotrophic. What does this mean?
    Mesotrophic lakes are characterized by moderately clear water, but have a increasing chance of low dissolved oxygen in deep water during the summer. Mesotrophic lakes contain moderate amounts of nutrients, and contain healthy, diverse populations of aquatic plants, algae, and fish. Occasional algae blooms may occur. If the lake is deep enough to stratify, the hypolimnion often becomes low in oxygen by the end of summer, and may result in some phosphorus release from the sediments.

View TSI data graph on the DNR website



Click on the maps to enlarge. Bathymetric Map Courtesy of and Copyright Sportsman’s Connection, based on Wisconsin DNR data. Watershed map courtesy of Manitowoc County Soil and Water Conservation Department. New! Zoom in even closer with this new interactive watershed mapping tool.  

 Other documents of interest:

Updated: January 28, 2020 — 4:15 pm

1 Comment

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  1. Looks like someone loves their lake!

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