Rock River Falls is a waterfall on Rock River in Alger County, Michigan, in the Northern Lakes and Forests region, with a total height of about 20 feet. It lies about 15.6 miles west of Munising and roughly 140.2 miles north of Green Bay as the crow flies.
At 20 feet it is taller than the typical Michigan waterfall of about 20 feet, ranking 52nd of 116 with a recorded height. The water comes down as a block waterfall, wider than it is tall, spilling over a broad ledge.
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.
There are 30 recorded waterfalls in Alger County. Silver Bell Falls, a 30-foot horsetail waterfall, is about 2.8 miles away. Silver Creek Falls, a cascade waterfall, is about 3.2 miles away. Laughing Whitefish Falls, a 100-foot cascade waterfall, is about 4.8 miles away.
Rock River Falls is located at 46.4112° N, 86.9764° 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 exact position has not yet been verified on aerial imagery, so treat the map pin as approximate. Details on trails, parking and access have not been documented for this waterfall yet.