<P> On August 10 , 1936 , after Minerva Hoyt and others persuaded the state and federal governments to protect the area , President Franklin D. Roosevelt used the power of the 1906 Antiquities Act to establish Joshua Tree National Monument . It protected about 825,000 acres ( 334,000 ha ) . In 1950 , the size of the park was reduced by about 290,000 acres to open the land to more mining . The park was elevated to a National Park on October 31 , 1994 , by the Desert Protection Act , which also added 234,000 acres to the park . </P>
<P> On August 10 , 1936 , after Minerva Hoyt and others persuaded the state and federal governments to protect the area , President Franklin D. Roosevelt used the power of the 1906 Antiquities Act to establish Joshua Tree National Monument . It protected about 825,000 acres ( 334,000 ha ) . In 1950 , the size of the park was reduced by about 290,000 acres to open the land to more mining . The park was elevated to a National Park on October 31 , 1994 , by the Desert Protection Act , which also added 234,000 acres to the park . </P>
when did joshua tree became a national park
when did joshua tree became a national park
October 31 , 1994
October 31 , 1994