
The Little Truckee River originates as the outflow from Webber Lake, a natural lake, in the Sierra Nevada north of Donner Summit.
It is a substantial stream by the area's standards and even has a couple of reservoirs in its lower reaches. In particular, it is the largest tributary to the main stem of the Truckee River. The Truckee in turn flows east into Nevada and is the primary water source for Reno and much of western Nevada. The Truckee itself ends at Pyramid Lake.
It's less than a mile below its start at the outflow from Webber Lake, and the Little Truckee drops into a narrow canyon over Webber Falls. The falls are about 100 feet high but consist of several steps, of which the lowermost and most significant is about 50 feet tall. They can be spectacular, especially during the spring runoff.