Answer:
Columbia, Yukon, Colorado, and Snake are the major rivers west of the Great Divide.
Step-by-step explanation:
The Great Divide runs roughly in a north-south direction from Alaska, through the western part of Canada, defines the eastern border of the west in the USA, and through the middle of Mexico and Central America. This is actually a chain of mountains that are acting as drainage boundaries. There are significantly more rivers, be it small or large on the eastern side of the divide, and this is mostly because the territory of the eastern side is significantly larger.
The major rivers on the western side of the divide are Columbia, Yukon, Colorado, and Snake. Yukon is a river that runs through Alaska. Columbia runs through the USA and Canada. Colorado runs through the USA and Mexico, while Snake runs just in the USA. All of these rivers have their springs high in the mountains on the western side of the divide and they all drain into the Pacific Ocean and its seas.