Sand Portage Falls is a stretch of rapids on Menominee River in Marinette County, Wisconsin, in the Northern Lakes and Forests region. It lies about 1.7 miles southeast of Niagara and roughly 85.8 miles north of Green Bay as the crow flies.
The Northern Lakes and Forests are a glaciated landscape of pine, spruce, aspen and northern hardwoods dotted with thousands of lakes and wetlands. Rivers step down over ancient bedrock ledges, with dark, tannin-stained water pouring over rock. Menominee River carries 3 recorded rapids along its course.
Marinette County holds 12 recorded rapids, and several are close by. Horserace Falls, is about 4.5 miles away. Quiver Falls, 5 feet high, is about 10 miles away. Carney Rapids, is about 13.5 miles away.
Sand Portage Falls is located at 45.7599° N, 87.9646° W. The listing is based on the World Waterfall Database, one of the sources compiled by the U.S. Geological Survey in its inventory of waterfalls and rapids of the conterminous United States. The creek name is confirmed against the federal Geographic Names Information System. The position was verified on aerial imagery. Details on trails, parking and access have not been documented for this rapid yet.