The 121st meridian west is a line of longitude that is 121 degrees west of the Greenwich Meridian, which is considered the prime meridian (0 degrees longitude). This meridian runs from the North Pole to the South Pole, passing through North America. In North America, the 121st meridian west runs through several regions, including parts of the United States and Canada. Notably, it passes through the western part of the state of Washington, Oregon, and into California.
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