Is yosemite valley a hanging valley?

A tributary valley that joins a main valley where the latter has been deepened, usually by glacial erosion, resulting in a steep drop from the floor of the tributary valley to the floor of the main...

7,912.09 kilometres (4,916.36 miles)

119 years old founded in 1890

The railroads supported its creation because they made money from the project.It was once necessary to use military action to protect it.

No. It is a valley in the Sierra Nevada mountain of CA.