what was it's impact?
The human and environmental costs of the Gold Rush were substantial. Native Americans, dependent on traditional hunting, gathering and agriculture, became the victims of starvation and disease, as gravel, silt and toxic chemicals from prospecting operations killed fish and destroyed habitats.
California Gold Rush
The human and environmental costs of the Gold Rush were substantial. Native Americans, dependent on traditional hunting, gathering and agriculture, became the victims of starvation and disease, as gravel, silt and toxic chemicals from prospecting operations killed fish and destroyed habitats. 
someone who went to california during the gold rush Forty-niners. when did it take place? 1848. who was the first person to discover it? James W. Marshall. how many took part in it? The news of gold brought approximately 300,000 people to California from the rest of the United States and abroad.
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California Gold Rush [SEP] Impact on Native Americans
The human and environmental costs of the Gold Rush were substantial. Native Americans, dependent on traditional hunting, gathering and agriculture, became the victims of starvation and disease, as gravel, silt and toxic chemicals from prospecting operations killed fish and destroyed habitats. The surge in the mining population also resulted in the disappearance of game and food gathering locales as gold camps and other settlements were built amidst them. Later farming spread to supply the settlers' camps, taking more land away from the Native Americans. In some areas, systematic attacks against tribespeople in or near mining districts occurred. Various conflicts were fought between natives and settlers.