Grand River Marsh
Marquette County, Wisconsin · WBIC 159900
The DNR lists this lake's watershed (Lower Grand River) as suspect or infected with VHS, a fish virus. The listing covers the watershed, not a test of this lake. About VHS
Size
3,000 acres
Max depth
7 ft
DNR lake type
Simple, Riverine
A river-like water type, with flow instead of a still basin. This describes the lake type in general, not this lake in particular.
Outline
Drawn from the DNR's 24K hydrography (surveyed 1984), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity (satellite estimate)
- Summer 20167.7 ft (2,331 satellite pixels)
- Summer 20179 ft (3,052 satellite pixels)
No one has measured this lake's clarity in the monitoring data. These are estimates from satellite images of two summers only, so they may not match the lake today.
Secchi depth is how far down a white disk stays visible. A bigger number means clearer water. The estimate tops out at 16 feet.
Landsat satellite estimates published by the Wisconsin DNR (summers 2016 and 2017), averaged over the lake's outline. Informational use only.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 4 (Mar 30 to Apr 13)
- Surface reaches 48°Fabout Apr 23 (Apr 13 to Apr 28)
- Surface reaches 64°Fabout May 24 (May 18 to May 26)
- June surface73°F, usually 72 to 75°F
- July surface80°F, usually 78 to 81°F
- August surface77°F, usually 74 to 78°F
Mixes regularly through the summer instead of forming a warm top layer.
A computer model of this lake's typical weather and water, built from 15 years, 2005 to 2019. Ranges show the middle half of years. The model was not calibrated against measured temperatures for this lake. It is an estimate, not a measurement.
Modeled: U.S. Geological Survey lake temperature data release (doi:10.5066/P9CA6XP8).
Today at the lake
Forecast: National Weather Service (no endorsement implied). Sunrise, sunset and moon phase are calculated. The moon phase can be a day off.
Fish recorded near this lake
- Central Mudminnow Umbra limi2026; 1 record
Recorded in open fish survey and museum records (GBIF). A record shows a fish was found near this lake in that year, not that it is there now, and says nothing about how many. Most coordinates are rounded to about 1 km, so a record is attached only when one lake is the clear match.
Open fish survey and museum records from GBIF; datasets are listed on the sources page. Checked Oct 23, 2026.
More lakes in Marquette County
- Puckaway Lake4.0 miles away
- White Lake6.4 miles away
- Cotters Lake6.5 miles away
- Metcalf Lake7.2 miles away
- Spring Lake7.4 miles away
- Mulhern Lake7.8 miles away
Where this comes from
- Size, depth and lake typeWisconsin DNR lake classifications, checked Oct 23, 2026
- OutlineWisconsin DNR 24K hydrography, checked Oct 23, 2026
- Regulations linkWisconsin DNR fishing regulations (linked, not restated), checked Oct 23, 2026
- Typical-year temperatureU.S. Geological Survey lake temperature model (modeled estimate), checked Oct 23, 2026
- Fish recordedOpen fish survey and museum records, via GBIF, checked Oct 23, 2026
- VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026
- Satellite clarity estimateLandsat summer clarity estimates published by the Wisconsin DNR (2016, 2017), checked Oct 24, 2026
See data sources for what each source covers, and about for how the numbers are matched to lakes.
Something wrong on this page? Report a problem.