Why was California more heavily populated than other western states in the 1800's?

California's population surged in the 1800s primarily due to the Gold Rush of 1848, which attracted hundreds of thousands of people seeking wealth and opportunity. Its favorable climate, fertile land, and access to the Pacific Ocean also made it an appealing destination for settlers, farmers, and entrepreneurs. Additionally, the completion of the transcontinental railroad in the late 1860s further facilitated migration and commerce, solidifying California's status as a key population center in the West.