Blum Basin Falls is a waterfall in Whatcom County, in the U.S. state of Washington.

It is located in North Cascades National Park on the headwaters of Blum Creek, a tributary of the Baker River.

The falls tumble 1,680 feet (510 m) down a high glacial headwall several miles within the national park in two distinct stages; the first is a series of slides over rounded rock, above the tree line, and the second is a series of near-vertical plunges to the forested valley below.

Contrarily, during low winter temperatures, the ice and snow ceases to melt, and the falls diminish in volume or may stop flowing completely.

However, as that date was before Mount Blum was named, the waterfall was also unknown and unnamed, and remains obscure to this day.