Why are there so many waterfalls along the rivers southeast of Mt Rainier?

The numerous waterfalls along the rivers southeast of Mt. Rainier are primarily due to the mountain's glacial activity and steep terrain. As glaciers melt, they create powerful streams that cascade down the rocky slopes, forming waterfalls. Additionally, the geology of the area, with its volcanic rock and varied topography, contributes to the formation of these dramatic water features. The combination of elevation changes and abundant water flow results in a striking landscape of waterfalls.