Mill Brook Cascade is a waterfall on Mill Brook in Grafton County, New Hampshire, in the Northeastern Highlands region, with a total height of about 42 feet. It lies about 3.5 miles northeast of Thornton and roughly 64.8 miles north of Manchester as the crow flies.
At 42 feet it is taller than the typical New Hampshire waterfall of about 30 feet, ranking 44th of 115 with a recorded height. The water comes down as a horsetail, where the water keeps some contact with the bedrock as it falls.
The Northeastern Highlands are the mountains of northern New England and the Adirondacks, with spruce-fir on the summits and northern hardwood forest of maple, beech and birch below, and countless lakes and boulder-strewn brooks. Fast mountain streams drop over granite and gneiss ledges in chains of falls and pools. Mill Brook carries 2 recorded waterfalls, and Mill Brook Cascade is the tallest of them.
There are 98 recorded waterfalls in Grafton County. Bastons Falls, a tiered waterfall, is about 3.9 miles away. Smarts Brook Cascades, a cascade waterfall, is about 4 miles away. Shell Cascade, a cascade waterfall, is about 4.4 miles away.
Mill Brook Cascade is located at 43.9252° N, 71.6224° 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.