The Ahnapee was a two-masted scow schooner built on the banks of the Ahnapee River in Algoma, Wisconsin in 1867. It was constructed by Neal McLean of Chicago and was celebrated as the first vessel launched in Kewaunee County. A July 15, 1867, article of the Detroit Post reported, "A fine vessel intended for the wood and lumber trade was launched on Wolf River." It was enrolled in Chicago of the same year. The service history of the Ahnapee was uneventful, with only a few minor accidents on-record throughout its nearly twenty years of operation. It was rebuilt, lengthened, and given three masts, in October of 1875.
On June 9, 1884, while southbound from Torch Lake, Michigan, the Ahnapee ran ashore on Sheboygan's North Point. It was carrying railroad ties and cordwood. A strong wind blew the Ahnapee into the rocky shore, where the bottom was pounded out of the hull. Despite being 2.5 miles from the life-saving service station in a dense fog, the ship's six-man crew was saved using a surfboard in tow of a tug. The station crew assisted in removing the deck load in the days following the wreck. The tug Welcome was brought from Milwaukee to release the schooner; unfortunately, salvage attempts were unsuccessful. The final enrollment document was surrendered in Milwaukee on June 30, 1884, declaring the Ahnapee a total loss.

Theodore Plattner of Milwaukee owned the Ahnapee at the time. He held no insurance on the vessel, which was valued at $2,000. The loss due to cargo was another $200.
The Ahnapee was abandoned at Sheboygan's North Point. While reported by historical sources, the actual location and condition of the Ahnapee have yet to be confirmed by field investigation.