El Dorado Canyon is a canyon in southern Clark County, Nevada famed for its rich mines. The canyon was named in 1857 by steamboat entrepreneur Captain George Alonzo Johnson when gold and silver was discovered here.[2][3] It drains into the Colorado River at the former site of Nelson's Landing.[3] The town of Nelson lies in the upper reach of the canyon. Eldorado Canyon Mine Tours operates mid way in the canyon at the Techatticup Mine.