Pierson B. Reading was born in 1816 in New Jersey and later crossed the country to California, where he engaged in various roles including clerk, explorer, and chief of trappers for General Sutter. He commanded Sutter's Fort and participated in the Bear Flag Revolt. During the Mexican–American War, he served as Paymaster of the California Battalion with the rank of Major. Reading was involved in gold prospecting following the 1848 gold discovery and operated a store in Sacramento. He pursued political aspirations as a Whig candidate for Governor of California and U.S. Senate, and his land grant claim was adjudicated by the US Supreme Court in 1854.

Pierson B. Reading's political identity is marked by a blend of rugged individualism and regional advocacy, underscored by a historical engagement with both gold prospecting and military service. His land grant claim and legal battles with the US Supreme Court reveal a deeply personal stake in property rights. Reading's participation in the Bear Flag Revolt and his military role in the Mexican–American War suggest a commitment to frontier justice and expansionist ideals.