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Sunset over the pine treeline on Slim Lake, the sun reflected on light chop

Nelson Dewey State Park

Nelson Dewey State Park is a state park in Grant County. It was established in 1935.

Nelson Dewey State Park State Park spans an unrecorded acreage acres in Wisconsin — a designated recreation destination with the full set of facilities the state park system provides. A handful of measured lakes (0) lie near the park; the cleanest on the readings is a nearby lake.

State parks pair well with the lake pages: the park itself usually has interpretive signage explaining the local lake system, but the per-lake readings tell you which actual lake in the system to head to.

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Designation
State Park
County
Grant County
Established
1935

Other Parks in the Area

Park location and metadata sourced from Wikidata. For trail maps, camping reservations, and current conditions, visit the official WI DNR page. Lake readings come from the EPA Water Quality Portal and are shown beside the EPA National Lakes Assessment condition class for the lake's ecoregion. Secchi clarity is shown, not classified.

Where to stay near Nelson Dewey State Park

Compare cabins, hotels, and vacation rentals near Nelson Dewey State Park — find a place to stay close to the park and its nearby lakes.

Top-rated places to stay near Nelson Dewey State Park

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Source: EPA National Aquatic Resource Surveys, 2026.