Qualla: Door Peninsula

Door Peninsula: Introduction

Mon, 23 Feb 2026 00:00:00 GMT

The French translated the name faithfully: Porte des Morts, Death's Door. The strait between the peninsula's northern tip and Washington Island has swallowed ships for centuries, its currents colliding where Green Bay meets Lake Michigan in a confusion of crosscurrents and shoals. The Menominee called the peninsula itself Kenatao -- simply "cape" -- as if a place this dangerous needed no embellishment. The earliest written reference dates to 1728, when a French cartographer labeled it Cap a la Mort, Cape of Death. The name stuck, eventually lending itself to the county, the peninsula, and a tourism brand that cheerfully markets what was once a mariner's nightmare. Door Peninsula juts northeast from Wisconsin's mainland for some seventy miles, a narrow ridge of Silurian dolomite that is, geologically speaking, a continuation of Niagara Falls. The same Niagara Escarpment that sends the falls crashing over its ledge resurfaces here as limestone bluffs, cave-riddled cliffs, and sinkholes that pock the farmland between cherry orchards.

Read more: Door Peninsula on Qualla

Door Peninsula: Stone Tools Older Than the Pyramids

Mon, 23 Feb 2026 00:00:00 GMT

People have been here far longer than the shipwrecks suggest. Paleo-Indian artifacts found at four sites near Sturgeon Bay -- the Cardy and Salisbury Steak sites on the city's south side, the Heyrman I and Boss Tavern sites along Highway 57 -- predate the Egyptian pyramids. The B...

Read more: Door Peninsula on Qualla

Door Peninsula: The Riddled Escarpment

Mon, 23 Feb 2026 00:00:00 GMT

Beneath the peninsula's pastoral surface, the dolomite is dissolving. Hundreds of sinkholes have been mapped in Door County, most formed by the slow subsidence of material into cavities rather than dramatic collapse. Farmers fill them by tilling; spring meltwater opens them again...

Read more: Door Peninsula on Qualla

Door Peninsula: Waters of Collision

Mon, 23 Feb 2026 00:00:00 GMT

The peninsula splits two bodies of water that behave differently. North of the tip, warm surface water from Green Bay flows eastward into Lake Michigan while cold lake water creeps into the bay along the bottom, a layered exchange that starves the bay of oxygen. A counterclockwis...

Read more: Door Peninsula on Qualla

Door Peninsula: Cherry Orchards and the North-South Divide

Mon, 23 Feb 2026 00:00:00 GMT

Door Peninsula's identity splits roughly at the Sturgeon Bay Ship Canal, completed in 1881, which technically made the northern half an island. North of the canal, tourism dominates: the cherry and apple orchards that made the peninsula famous, the art galleries of Fish Creek and...

Read more: Door Peninsula on Qualla