Profession: Business Tycoon and Railroad Executive
Biography: One of the "big four" of 19th century American railroad magnates. In 1861 along with Leland Stanford, Charles Crocker, and Collis P. Huntington he formed the Central Pacific Railroad company to link California with the east coast.
- 1854-09-22 Future railroad magnate Mark Hopkins Jr. marries Mary Sherwood
- 1862-07-10 US begins construction of Central Pacific Railroad
- 1869-05-10 Golden Spike driven, completing the 1st US Transcontinental Railroad at Promontory Summit, Utah and connecting the Central Pacific Railroad with the Union Pacific