In 1739, French fur traders Pierre and Paul Mallet, while journeying through the Great Plains, discovered a range of mountains at the headwaters of the Platte River, which local American Indian tribes called the "Rockies", becoming the first Europeans to report on this uncharted mountain range.
En 1739, os comerciantes de peles franceses Pierre e Paul Mallet, mentres viaxaban a través das Grandes Planicies, descubriron unha cordilleira de montañas na cabeceira do río Platte, á cal as tribos nativas chamaban "Rochosas", converténdose nos primeiros europeos en informar desa descoñecida cordilleira.