Isaac Graham (April 15, 1800 – November 8, 1863) was a fur trader, mountain man, and land grant owner in 19th century California.
With partners Henry Naile and William Ware, Graham established a distillery to supplement declining incomes from fur trading, owing to dwindling numbers of sea otters from the Central Coast.
[4][5] In 1836 Graham led a group of American and European immigrants who supported Juan Bautista Alvarado and José Castro in the coup against Mexican Governor of Northern California Nicolás Gutiérrez.
credited the incident with assisting in the formation of an American political justification for Washington's eventual annexation of California.
[6] In 1841, upon his return from Mexico, Graham moved north to the Santa Cruz area, where he established another distillery at Rancho Zayante, near the present-day community of Felton.