Waterfowl Production Area · Worth County, Iowa

Grass Lake Waterfowl Production Area

Public land (fee title)Walk-in access

Grass Lake Waterfowl Production Area is a 145-acre tract of federally owned wetland and grassland habitat in Worth County, Iowa. It is managed by the Iowa Wetland Management District as part of the Worth County Waterfowl Production Area group of WPAs. Waterfowl Production Areas are purchased largely with Federal Duck Stamp dollars and are generally open to hunting, trapping and fishing under state regulations, with some federal restrictions.

Navigate here Satellite map Iowa WMD rules →
145GIS acres
145deeded acres
Worth Countycounty
8WPAs within 40 mi

Grass Lake WPA satellite map

Gold outlines are fee-title Waterfowl Production Areas — public land. Everything outside is typically private; always look for boundary signs.

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Waterfowl Production Area (public)County lineRefuge / station Tip: switch to Satellite or USGS Topo in the layer menu · click the map for GPS coordinates
All WPAs in Worth County:KMLGPX

Hunting on Grass Lake WPA

What you can typically do

  • Hunt waterfowl, upland birds, deer and other game in season under Iowa regulations
  • Walk in from roads or designated parking areas — vehicles generally stay off the tract
  • Fish and trap where state rules and district regulations allow
  • Wildlife watching, photography and hiking

Common restrictions

  • No camping, fires or overnight use on most WPAs
  • Motorized vehicles only on designated roads/parking
  • Temporary blinds and stands usually must be removed daily
  • Non-toxic shot required for waterfowl — many districts require it for all shotgun hunting
  • Some tracts have closed areas or special regulations — check signs

How to get to Grass Lake WPA

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Destination: Grass Lake Waterfowl Production Area

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Decimal
43.49140, -93.27556
DMS
43°29′29.0″N 93°16′32.0″W

Nearest towns

  • Mason City, IA24 mi N of town
  • Rochester, MN54 mi SW of town
  • Mankato, MN58 mi SE of town

Closest airports

  • MSP Minneapolis–St. Paul96 mi

Straight-line distances. Driving routes are longer; many refuge roads are gravel and may close seasonally.

Shooting hours at Grass Lake WPA

Today at Grass Lake WPA

Legal light*–
Sunrise–
Sunset–

*½ hour before sunrise — the standard federal shooting-hour start for migratory game birds. Times in Chicago local time.

Full season calculator →

2026–2027 season sun table

DateShooting lightSunriseSunsetDaylight
Tue, Sep 1, 20266:05 AM6:35 AM7:51 PM13h 15m
Tue, Sep 15, 20266:21 AM6:51 AM7:25 PM12h 35m
Thu, Oct 1, 20266:38 AM7:08 AM6:56 PM11h 47m
Thu, Oct 15, 20266:55 AM7:25 AM6:31 PM11h 06m
Sun, Nov 1, 20266:17 AM6:47 AM5:06 PM10h 19m
Sun, Nov 15, 20266:36 AM7:06 AM4:49 PM9h 44m
Tue, Dec 1, 20266:55 AM7:25 AM4:39 PM9h 13m
Tue, Dec 15, 20267:08 AM7:38 AM4:37 PM8h 59m
Fri, Jan 1, 20277:15 AM7:45 AM4:46 PM9h 00m
Fri, Jan 15, 20277:13 AM7:43 AM5:00 PM9h 17m
Mon, Feb 1, 20277:00 AM7:30 AM5:22 PM9h 52m

Computed for 43.491, -93.276 (CDT / DST-aware). Check state rules — big game hours vary.

7-day forecast

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Forecast from the National Weather Service. Wind direction matters — plan your approach downwind of where game beds.

Nearby Waterfowl Production Areas

WPAAcresDistanceCounty
Bhagyam WPA2816.6 mi WFreeborn County
Goose Creek WPA4747.9 mi NWFreeborn County
Elk Creek WPA5438.7 mi SWWorth County
Twin Lake WPA30010 mi NWFreeborn County
Pickerel Lake WPA24512 mi NWFreeborn County
Goose Lake WPA16712 mi NFreeborn County
Harlontown Slough WPA93912 mi SWWorth County
Hogsback Marsh WPA24013 mi WWinnebago County

Closest refuges & districts

Iowa WMD

Kossuth County, IA · 44 mi W

1 open3 special1 closed
🦌🦆🦃🐦🕊️🐇🐗🎣

27.5K huntable acres

Union Slough NWR

Kossuth County, IA · 47 mi W

3 special1 closed
🦌🦆🦃🐦🕊️🐇🐗🎣

2.8K huntable acres

Minnesota Valley WMD

Le Sueur County, MN · 62 mi N

2 special
🦌🦆🦃🐦🕊️🐇🐗🎣

8.7K huntable acres

Source: USFWS Realty Tracts (fee-title interest), Worth County Waterfowl Production Area. Acreage from GIS polygons; deeded acreage from realty records.