In 1900, seven-year-old Clara Osborne and her father, who was mining near the Colorado River, sailed down the waterway from Topaz, California, to Toprock, Arizona, on a raft manned by Mohave Indians.In 1900, seven-year-old Clara Osborne and her father, who was mining near the Colorado River, sailed down the waterway from Topaz, California, to Toprock, Arizona, on a raft manned by Mohave Indians.