Isla Espiritu Santo is an island in the Gulf of California protected under 联合国教科文组织 as a bio-sphere. It is located in 南下加利福尼亚州, 墨西哥. It is connected to Isla Partida by a slender isthmus. Both islands are uninhabited. They both are a part of the municipality of 拉巴斯, which is just a short boat ride away.