Yaak Falls is a waterfall on Yaak River in Lincoln County, Montana, in the Northern Rockies region, with a total height of about 30 feet. It lies about 19.9 miles east of Bonners Ferry and roughly 91.8 miles northeast of Spokane Valley as the crow flies.
At 30 feet it is on the modest side for Montana, where the typical waterfall with a recorded height stands around 250 feet; it ranks 113th of 123. The water comes down as a block waterfall, wider than it is tall, spilling over a broad ledge.
The Northern Rockies are rugged, glaciated mountains with dense forests of western red cedar, hemlock, larch and Douglas fir in the moist valleys and alpine terrain above. Abundant snowmelt feeds rivers and cascading creeks.
There are 14 recorded waterfalls in Lincoln County. Katka Falls, is about 11.9 miles away across the state line in Idaho. Kootenai Falls, a 30-foot tiered waterfall, is about 14.4 miles away. Moyie Falls, 85 feet high, is about 14.4 miles away across the state line in Idaho.
Yaak Falls is located at 48.6483° N, 115.8851° 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 waterfall yet.