Hidden Valley

 is in a fenced-in area nestled between hills and rocks roughly north-east of the New California Republic Correctional Facility (or NCRCF for short) and south-east of Sloan. The valley is home to numerous bark scorpions and remnants of the Mojave chapter of Brotherhood of Steel that once occupied HELIOS One.

Background

 * Transcripts from the Hidden Valley bunker terminal:



Layout
Hidden Valley can be accessed via the road near Sloan and at the northwest and southeast corners where the fence is down. There are also small side-paths, at least one of which is heavily inhabited by bark scorpions and the occasional giant radscorpion when going in the direction of Scorpion Gulch nearby.

Inside the fenced area, four bunkers are spread around the perimeter of the area. Three of four bunkers are just a large entry room with a locked door on the opposite side that lead to nowhere, but may contain some notable loot.

Buildings
The entry room has 3 skeletons with a bottle of wine on a sleeping mat. The locked (Easy) door in this bunker hides a hundred 5mm rounds and twenty four 5.56mm rounds. along with two skeletons and a briefcase which suggests a sad story.
 * East bunker

At the end of the room behind the locked door (average) is a pair of mini nukes, a stimpak and some 5.56 ammo.
 * North bunker

This bunker has two grenade bouquets hanging from the ceiling at the bottom of the staircase. The entry room contains a sleeping pad and a sack, along with a journal indicating that someone is using the bunker as a safehouse. The locked (Hard) door here opens the way to 3 ammunition boxes, a mini nuke under a tin plate which you will have to move in order to see, a steam gauge assembly and 2 units of scrap metal on the right, and a frag grenades and some 5.56 ammo on the left.
 * South bunker

The fourth bunker, also known as Hidden Valley Bunker, is the home of the Brotherhood of Steel. The bunker is marked by a small broken tree stump directly on top of the dome. You will not be able to gain access to this bunker unless you have taken the holotape containing the passphrase from the two dead Brotherhood of Steel Paladins at the REPCONN Headquarters, the one near Black Mountain, or the 2 dead Brotherhood soldiers in a ditch on the artillery battered area outside Nellis Air Force Base.
 * West bunker

If you have the holotape and passphrase, the PC will be given the option to say it into the intercom. Otherwise you can attempt to pick the Very Hard lock or by having follower Veronica Santangelo with you. Access can also be granted through the quest Wild Card: Side Bets.

Notable loot

 * North Bunker: Behind the locked (Average) door are a pair of mini nukes.
 * South Bunker: Behind the locked (Very Hard) door is a mini nuke under a Tin plate, which you will have to move in order to see.

Appearances
appears only in Fallout: New Vegas.

Bugs

 * After wandering though the bunker and exiting out into the wasteland again sometimes might spawn around 2-5 Bark Scorpions right outside of the bunker you came from.
 * In the hill paths leading to Hidden Valley, it is possible to encounter deathclaws from Quarry Junction, including the dreaded Deathclaw alpha. It may pop out from under the hills or rocks.
 * In the South bunker if you activate the tripwire (which is attached to the grenades), it may kill you and freeze the game/console.
 * Because of the high spawning rate of scorpions, there will be a lot of bugs related to them, such as scorpions spawning partially in the ground, or their corpses getting stretched and bounce up and down repeatedly along the ground.
 * If you fast travel to Hidden Valley and arrive just before the sun rises, the ground may turn black and the distant surrounding areas will have turned into a hazed green. The ground will eventually change back into color but the screen will go completely black afterwards and the game will need to be restarted. A way to avoid this is if you make your way out of Hidden Valley before the screen changes. This is most likely a glitch from the sandstorm that flows throughout the area at night.
 * A Securitron mk1 may spawn in the bunker, blocking the player.
 * When entering the hidden valley, if you go above the actual route, you may fall and get stuck on some rocks. there are bark scorpions around making you unable to fast travel.
 * It is possible to get infinite ammo from the supply footlocker. Take the ammo, craft something in lvl 2 with it, then return, and the footlocker will be resupplied. Simply exiting and reentering the bunker will also respawn more ammo.
 * sometimes the BOS will become hostile.
 * It is possible to go through the ruins blocking the entrance to the Bunker. You are unable to get out however once inside.