The Forty-First Parallel is a circle of latitude that is 41 degrees north of the Earth's equatorial plane. It runs across several countries, including the United States, where it passes through states like California, Nevada, Utah, Colorado, and Nebraska. This parallel is significant in geography and is often used as a reference point for various mapping and navigation purposes. In the United States, the Forty-First Parallel is notable for its historical context, as it was used in the 19th century to define boundaries and territories. It also intersects with various natural features, such as the Sierra Nevada mountain range and the Great Plains, contributing to the diverse landscapes found along its path.