Issued to commemorate the centennial of the pivotal event that reshaped California and the nation, this 1948 stamp depicts the discovery of gold at Sutter's Mill. The design vividly portrays the "Forty-Niners," the determined prospectors who, with gold pans and high hopes, flocked to the Sierra Nevada foothills. The image of Sutter's Mill in the background grounds the scene in its historical context. The Gold Rush was a transformative period, leading to a massive migration, the rapid growth of cities like San Francisco, and California's admission to the Union in 1850. This stamp not only celebrates the discovery of a precious metal but also honors the adventurous spirit and perseverance of those who participated in one of the most significant events in American history.