Respuesta :
Answer:
He was the first American to enter California from the east and return from it by an overland route. He was also a trader and explorer
Jedidiah S. Smith, an American explorer and trader
Explanation
He is most notably known for being the first person to enter California from the east and return from it using an overland route, being the first white man to cross what we now know as Utah and Nevada, the first to scale the High Sierras, and the first explorer to reach Oregon overland by traveling up California's coast.