43.7287795, -89.2609649

Main Dam Impoundment Boat Ramp

Fee not yet verified Status not yet verified Public access Updated Sep 26, 2026
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Main Dam Impoundment Boat Ramp is a public launch on Grand River - Main Impoundment in Marquette County, Wisconsin . We currently track 2 public launch sites on this waterbody.

The nearest community is Montello, about 5.2 miles away. The closest larger city is Oshkosh, approximately 41.2 miles away. The site lies within the Grand River watershed, as defined by the EPA.

Sourced from Wisconsin Department of Natural Resources . See the freshness details in the sidebar.

Boat ramps on Grand River - Main Impoundment

We currently track 2 public boat ramps on Grand River - Main Impoundment , including this one. The other public launch sites on this waterbody are listed below, starting with the closest.

Nearby boat ramps in Marquette County

We currently track 32 public boat ramps in Marquette County. The closest ramps are listed below, along with the waterbody each one provides access to.

Frequently asked questions

We haven't confirmed the current launch fee with the managing agency yet - check the fee badge at the top of this page, which updates as soon as we do.

We don't yet have a confirmed parking count for this location from the managing agency.

This ramp's access type isn't specifically flagged for hand-launched craft, but a trailer ramp can generally be used to launch a kayak or canoe by hand as well.

Main Dam Impoundment Boat Ramp provides access to Grand River - Main Impoundment, one of 2 public launch sites we track on it.

This listing is sourced from Wisconsin Department of Natural Resources records.

This listing was last checked against the source on July 11, 2026. The page content itself was last updated on September 26, 2026.

Quick facts

County
Marquette County, Wisconsin
Nearby places
Montello (5.2 mi)
Dalton (5.7 mi)
Marquette (6.2 mi)
Coordinates
43.7287795, -89.2609649 Gaia
Waterbody
Grand River - Main Impoundment
Access type
Public

Current weather

0°F

Wind N 0 mph

Full NWS forecast · via National Weather Service
Last updated Oct 12, 2026 at 5:02 AM

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Data freshness

How current this listing is, and how it's been maintained.

Last checked against source
July 11, 2026
Page content updated
September 26, 2026
Listed on Boat Ramp US since
September 26, 2026