What geographical feature is the name "Appaloosa" derived from?

The name "Appaloosa" is derived from the Palouse River, which is located in the regions of Washington and Idaho. The horses were originally bred by the Nez Perce tribe in the Palouse River Valley, and the term "Appaloosa" itself is thought to have evolved from the Palouse River's name. This connection to the river highlights the geographical and cultural significance of the area in relation to the breed. This is important as it provides insight into the historical context of the Appaloosa horse, emphasizing its roots and heritage tied to the specific region, which shapes its identity within the horse world.