44.7252979, -89.7875326

Highway O - South Boat Ramp

Fee not yet verified Status not yet verified Semi-Private access Updated Sep 26, 2026
View more boat ramps near me

Highway O - South Boat Ramp is a semi-private launch on Big Eau Pleine River - Big Eau Pleine Reservoirer in Marathon County, Wisconsin .

The nearest community is Knowlton, about 5.2 miles away. The closest larger city is Appleton, approximately 74.8 miles away. The site lies within the Lake Dubay watershed, as defined by the EPA.

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

Boat ramps on Big Eau Pleine River - Big Eau Pleine Reservoirer

Highway O - South Boat Ramp is currently the only public boat ramp we track on Big Eau Pleine River - Big Eau Pleine Reservoirer . If you know of another public launch nearby, let us know.

Nearby boat ramps in Marathon County

We currently track 39 public boat ramps in Marathon 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.

Highway O - South Boat Ramp provides access to Big Eau Pleine River - Big Eau Pleine Reservoirer.

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
Marathon County, Wisconsin
Nearby places
Knowlton (5.2 mi)
Mosinee (6.2 mi)
Milladore (9.0 mi)
Coordinates
44.7252979, -89.7875326 Gaia
Waterbody
Big Eau Pleine River - Big Eau Pleine Reservoirer
Access type
Semi-Private

Current weather

64°F Clear

Wind S 9 mph

Full NWS forecast · via National Weather Service
Last updated Oct 12, 2026 at 4:33 AM

Google Maps Apple Maps
Open in Gaia GPS Report incorrect info

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