  malakoff diggins state historic park is a state park unit preserving the largest hydraulic mining site in california, united states. the mine pit and several gold rush-era buildings were listed on the national register of historic places as the malakoff diggins-north bloomfield historic district. the "canyon" is  long, as much as  wide, and nearly  deep in places. visitors can see huge cliffs carved by mighty streams of water, results of the mining technique of washing away entire mountains of gravel to wash out the gold. the park is a  drive north-east of nevada city, california, in the gold rush country. the  park was established in 1965. ==history== left|thumb|hydraulic mining underway in north bloomfield in 1890 while beautiful in its own way, the malakoff mine pit on the san juan ridge is a testimony to the avarice that was part of the california gold rush,
1965_establishments_in_California California_Gold_Rush California_State_Historic_Parks Historic_districts_in_California Mining_museums_in_California Museums_in_Nevada_County,_California National_Register_of_Historic_Places_in_Nevada_County,_California Open_air_museums_in_California Parks_in_Nevada_County,_California Protected_areas_established_in_1965 Protected_areas_of_the_Sierra_Nevada_(U.S.)