<P> The Intermountain West, or Intermountain Region, is a geographic and geological region of the Western United States . It is located between the front ranges of the Rocky Mountains on the east and the Cascade Range and Sierra Nevada on the west . </P> <P> The Intermountain West has a basin and range and plateau topography . Some of the region's rivers reach the Pacific Ocean, such as the Columbia River and Colorado River . Other regional rivers and streams are in endorheic basins and cannot reach the sea, such as the Walker River and Owens River . These flow into brackish or seasonally dry lakes or desert sinks . Portions of this region include: </P> <Ul> <Li> Basin and Range Province </Li> <Li> Colorado Plateau </Li> <Li> Great Basin </Li> <Li> Intermontane Plateaus </Li> </Ul> <Li> Basin and Range Province </Li>

Which of the following is not a major river in the intermontane west