Why do rivers in the rocky mountain flow west?

Rivers in the Rocky Mountains generally flow west due to the region's topography and the natural slope of the land. The mountains create a watershed that directs water toward the Pacific Ocean. As precipitation falls on the eastern slopes, gravity pulls the water downhill, leading it to flow westward into various tributaries and ultimately into larger river systems that lead to the coast. Additionally, the geological uplift of the Rockies also influences the direction of river flow.