St. Croix River

About

St. Croix River, Maine New Brunswick — 1604 Saint Croix Island, 1842 Webster Treaty, 1968 Wild/Scenic 100-mi. The paddling numbers frame the river before the history does. The St. Croix runs 114 miles at a Class I–II rating, with an optimal flow window of 500 to 3,000 CFS. USGS gauge 01021000 reports a mean of roughly 1,800 CFS, with a historical figure near 1,620 and a documented minimum around 890. Two sections define the trip: Vanceboro to Loon Bay, 30 miles of remote boreal upper river at Class I–II, and Grand Falls to Calais, 40 miles of lower river at Class I where tidal influence begins to make itself felt.

The deeper story begins with the Passamaquoddy, for whom the St. Croix was homeland. Their name, Schoodic, translates as "burnt ground," and the river's salmon, alewife, and shad runs anchored their communities across generations. When Pierre Dugua's expedition landed on Saint Croix Island in 1604, it marked the beginning of a continuous French presence in North America — though the winter that followed killed nearly half the party before spring broke.

Diplomacy would later claim the river as firmly as survival once had. On October 25, 1798, an International Boundary Commission convened under the terms of Jay's Treaty and formally established the St. Croix as the boundary between New Brunswick and Maine, settling a line that had long been disputed. The 1842 Webster Treaty carried a boundary survey from the Monument at the source of the St. Croix to the River St. John, defining the modern era of the border.

Between treaty and restoration came the timber years. From the 1830s through the 1920s, the watershed was logged to feed the regional timber industry of the 1850s–1910s and the railroad expansion of the 1860s–1910s. Local sawmills, logging drives, and downstream lumber operations were the major operators. The old-growth stands were exhausted by 1910; state forestry conservation began in 1915, and the establishment of state forests in the 1930s ended large-scale logging on the river.

Stewardship now defines the corridor. In 1968 a Wild and Scenic River designation protected parts of the river, and in 1984 the United States and Canada established the St. Croix International Waterway Commission to jointly manage the border corridor, balancing recreation, conservation, and the interests of the Passamaquoddy Nation. From 2010 to the present, Maine's Department of Natural Resources, working with local watershed partnerships, has addressed more than a century of logging, agricultural, and industrial impacts through streambank stabilization, native fish restocking, nutrient reduction, and water-quality work. The river runs through the Moosehorn NWR and past the Saint Croix Island International Historic Site, supporting the Calais, Eastport, and St. Stephen economies and drawing anglers after bass and salmon.