If you want the Hidden Vally Bunker Key, you need to pickpocket one of the Members of the brotherhood of steel
Locate the Brotherhood of Steel in Hidden Valley BunkerSpeak with Paladin RamosSpeak with Elder McNamaraDeal with the NCR RangerSpeak with Elder McNamaraRetrieve 3 Holodisks from fallen Brotherhood paladinsReturn to Elder McNamara, and give him the 3 holodisksMeet with 3 Brotherhood scouts and obtain their reportsGive Elder McNamara the 3 scout field reportsRetrieve the parts for the air filtration systemReturn to Hidden Valley and give parts to Lorenzo
No one knows because it is hidden. That is why it is called the Hidden Valley.
Hidden Valley Farm was created in 1858.
The Hidden Valley of Oz was created in 1951.
Hidden Valley National Park was created in 1982.
The area of Hidden Valley National Park is 20.68 square kilometers.
Hidden Valley - 1916 was released on: USA: 5 November 1916
Hidden Valley - 1932 was released on: USA: 10 October 1932
The address of the Stone House Historical Society is: 18174 Hidden Valley Road, Hidden Valley Lake, CA 95467
The web address of the Hidden Valley Nature Center is: www.hvnc.org
Hidden Valley Days - 1948 was released on: USA: 5 February 1948