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It started about six months ago. At first it was just supplies going missing - we figured it was refugees. Then people started dying. Always a single bullet to the head, always from extreme range. We've lost eight refugees and three soldiers to this son of a bitch. We know he must be hiding out in one of the caves up in the mountains, but I don't have enough men to send out looking for him!Captain Gilles

Climb Ev'ry Mountain is a side quest in Fallout: New Vegas.

Quick walkthrough

Side Quest: Climb Ev'ry Mountain
Head to Bitter Springs and speak to Captain Gilles located in the tent behind the infirmary, follow the dialogue asking about Bitter Springs with her to begin the quest.
Head out to the Great Khan supply cave, located northwest of Bitter Springs, to find Oscar Velasco.
Kill Oscar
Talk to Oscar, asking him if he is the assassin will get him to divulge his opinion of the "refugee camp".
Convince Oscar to exact revenge upon the people responsible for killing his family, the NCR (Speech 50).
Convince Oscar to let go of his anger and move on, returning to the Great Khans (Speech 50).
Reward: Bad Karma
Reward: Good Karma and Great Khans supply cache key.
Head back to Bitter Springs and talk to Gilles again, tell her you have solved her problem to complete the quest.
Reward: NCR fame and 100 XP

Detailed walkthrough

Head down to Bitter Springs which is located east of the Brotherhood of Steel safehouse. follow the road east of the New Vegas Medical Clinic all the way, Bitter Springs should be just to the north near the end of the road, when the road curves north. Talk to Captain Gilles who should be located in a tent behind the infirmary up the slope to the back of the town. Ask her about Bitter Springs and she will mention that someone is picking off her people at night. Pursue the issue, and she mentions that 8 refugees and 3 NCR troopers have been killed, always by a single bullet to the head. She knows the assassin is hiding up in the caves somewhere but she doesn't have the manpower to go searching for him.

After conversation, the quest marker points to an area slightly northwest of Bitter Springs, almost directly east from Bloodborne cave. The easiest way to reach this place is to head up behind the NCR tents until one reaches the second Great Khan supply cave. Facing the entrance, hug the wall left of the cave and head back towards Bitter Springs. You should be unsuccessfully climbing a steep hill. Soon enough one will be able to fall onto a large rock attached to this hill. Get on the rock then continue trying to climb the hill while moving forwards and falling down onto some more rocks. One will reach flat ground after the rock and can head towards the marker. There will a valley full of some small rocks. Hug the right wall of this valley to get to slim opening in 2 large, gray rocks. Also, Upon reaching a rock that has a small tree growing on it, look directly to the north and the opening leading up to the cave should be visible.

Alternatively, an easier way to get to the cave is as follows: North of Coyote Tail Ridge, there is a Great Khan graveyard. Facing west, run up the hill, turn north upon reaching the top, and head straight to the cave.

If Bloodborne cave has already been discovered, go east from it and search for a Coyote tobacco chew bush. It should be almost on top of the quest marker. Looking up hill, there will see a path going up, this path leads to the cave.

Once inside the cave, a Great Khan known as Oscar Velasco will talk to the player character after setting a few steps into the cave. If one is disguised as NCR or have Boone as a companion, he will shoot on sight. Picking the first conversation option will immediately turn him hostile. Asking him if he is the assassin will get him to divulge his opinion of the "refugee camp". He reveals that he is trying to exact revenge upon the NCR for killing his family during the Bitter Springs massacre. The player can choose to tell Oscar they will kill him which will force combat; killing Oscar will grant good karma (since he was killing civilians) but infamy with the Great Khans. Passing a speech check of 50 will allow one to persuade him to either leave peacefully or exact revenge upon the people responsible: the NCR. The latter will see him run off to Camp McCarran and undoubtedly get killed, resulting in bad Karma. The best option is to persuade him to head back to Red Rock Canyon. He will provide a key which unlocks the gates in the Great Khan Supply Caches located around the mountains, also resulting in good Karma. If one spoke to Oscar, returned to Captain Gilles and told her of Oscar, then speaks with Oscar again and fails the speech check of 50, there is an option to tell Oscar that you promised the captain to put an end to the attacks. Oscar will say that the player must kill him to stop the attacks and asks why he should even let the player go since they could inform the NCR of his location. This forces a speech check of 25 where one can tell the truth or lie that they will not reveal Oscar's location (unknown what difference lying vs telling the truth makes).

Head back to Bitter Springs and talk to Gilles again and tell her the problem has been solved. This completes the quest.

Quest stages

10 Find the source of the attacks on Bitter Springs.
20Quest finishedTell Captain Gilles about Oscar Velasco.


  • Outside Oscar Velasco's cave is a location with a good view of the northern end of the map and New Vegas.
  • Wearing NCR attire, Brotherhood of Steel attire or having Boone as a follower causes Oscar to become hostile, and he will fire a 40mm grenade launcher upon walking in. Fortunately he never has more than four 40mm rifle grenade rounds. Having Boone wait outside the cave will avoid the latter problem.
  • If the quest is completed by passing the Speech (50) check, Oscar Velasco can be seen walking towards Red Rock Canyon.
  • If he is convinced to take his revenge on Camp McCarran, the next time one enters the camp, he will show up there and attack the forces of the NCR with a mere knife.

Behind the scenes

The quest name is a reference to The Sound of Music song, "Climb Ev'ry Mountain" (1959).


  • Playstation 3Playstation 3 Xbox 360Xbox 360 Even if the player character has been to the cave on top of the mountain and completed the quest, they get the reward, but the quest will still be active in the Pip-boy as if they have not completed it. Completing the quest No, Not Much should open up Captain Gilles' dialogue tree about Oscar, even if one previously spoke to her and the option to tell her about Oscar was not available. [verified]
  • PCPC Playstation 3Playstation 3 Successfully passing the Speech check of 25 where Oscar asks why he should allow the player character to leave alive gives 25 XP for telling the truth or lying. This Speech check can be repeated an unlimited number of times. [verified]
Main quests
Act 1Ain't That a Kick in the Head · Back in the Saddle · By a Campfire on the Trail · They Went That-a-Way · Ring-a-Ding-Ding!
Act 2Wild Card (Wild Card: Ace in the Hole, Change in Management, You and What Army?, Side Bets, Finishing Touches) · The House Always Wins (I, II, III, IV, V, VI, VII, VIII) · Render Unto Caesar · Et Tumor, Brute? · Things That Go Boom · Kings' Gambit · For the Republic, Part 2 · You'll Know It When It Happens/Arizona Killer
Act 3No Gods, No Masters · All or Nothing · Veni, Vidi, Vici · Eureka!
Side quests
New California RepublicAnywhere I Wander · Back in Your Own Backyard · Bitter Springs Infirmary Blues · Boulder City Showdown · Can You Find it in Your Heart? · Climb Ev'ry Mountain · Don't Tread on the Bear! · Emergency Radio · Eye for an Eye · Flags of Our Foul-Ups · Hard Luck Blues · I Don't Hurt Anymore · I Put a Spell on You · Keep Your Eyes on the Prize · Medical Mystery · No, Not Much · Pressing Matters · Restoring Hope · Return to Sender · That Lucky Old Sun · The White Wash · There Stands the Grass · Three-Card Bounty · We Will All Go Together · You Can Depend on Me
Caesar's LegionBeware the Wrath of Caesar! · Caesar's Favor · Caesar's Foe · Caesar's Hire · Cold, Cold Heart · I Hear You Knocking · The Finger of Suspicion · We Are Legion
The StripBeyond the Beef · Bye Bye Love · Classic Inspiration · How Little We Know · Pheeble Will · Talent Pool · The House Has Gone Bust! · The Moon Comes Over the Tower
Freeside & Outer VegasBirds of a Feather · Bleed Me Dry · Debt Collector · G.I. Blues · High Times · Someone to Watch Over Me · The Coyotes · Wang Dang Atomic Tango
BoomersAnt Misbehavin' · Sunshine Boogie · Volare! · Young Hearts
Great KhansAba Daba Honeymoon · Cry Me a River · Don't Make a Beggar of Me · Oh My Papa
Powder GangBooted · I Fought the Law · Run Goodsprings Run · Why Can't We Be Friends?
Brotherhood of SteelEyesight to the Blind · Still in the Dark · Tend to Your Business
OtherCome Fly With Me · Crazy, Crazy, Crazy · Ghost Town Gunfight · Guess Who I Saw Today · Left My Heart · My Kind of Town · The Legend of the Star and A Valuable Lesson · Unfriendly Persuasion · Wheel of Fortune
Companion questsED-E My Love · For Auld Lang Syne · Heartache by the Number · I Could Make You Care · I Forgot to Remember to Forget · Nothin' But a Hound Dog · One for My Baby
Unmarked questsA Bit of Slap and Tickle · A Final Plan for Esteban · Access Powers · All Fired Up! · An Ear to the Ground · Andy and Charlie · Arachnophobia · Arizona Scavenger · Barton the Fink · Bear Necessities · Big Winner (Atomic Wrangler, The Gomorrah, The Tops, Ultra-Luxe, Vikki & Vance) · Bounty Killer (I, II) · Brotherhood Bond (I, II) · Caching in at the Cove · Cajoling a Cudgel · Claws Mended · Claws Out · Dealing with Contreras · Defacing the Humble Stone · Democracy Inaction · Don't Poke at the Bear! · Eddie's Emissary · Exhumin' Nature · Fight Night · Flogging a Dead Corpse · Friend of the Followers · Gland for Some Home Cooking · Harder, Better, Faster, Stronger · Hat's Entertainment · Help for Halford · Hidden Valley computer virus · Highway to the Danger Zone (I, II) · Honorary Rocketeer · I Love Bananas · Iron and Stealing · Keith's Caravan Charade · Laurifer Gladiator · Lenk's Bad Debts · Lily and Leo · Long-Term Care · Malleable Mini Boomer Minds · Maud's Muggers · Meeting an Equal · Missing a Few Missiles · Most Wanted · Not Worth a Hill of Corn and Beans · Old School Ghoul · A Pair of Dead Desperados (I, II) · Papers, Please · Pistol Packing · Playing on the Old Joana · Poor Meat Never Makes Good Soup · Powder to the People · Power to the People · Razzle Dazzle! · Reach for the Sky, Mister! · Rest and Resupply · Ringo's Caravan Rules · Rotface's Loose Lips · Saving (or Savaging) Sergeant Teddy · The Screams of Brahmin · Silus Treatment · Short-Term Treatment · Smooth-Talking Criminal · The Star Showdown · Strategic Nuclear Moose · Straus Calls · Strip Search · Suits You, Sarah · Tags of Our Fallen · A Team of Moronic Mercenaries · Thought for the Day · Tourist Traipse · Trudy's Radio Repair · A Trusted Aide · Useless Baubles or Fancy Trinkets? · We Must Stop Beating Like This · We Must Stop Meeting Like This · Wind-Brahmin Wrangler · You Gotta Break Out a Few Eggs · You Make Me Feel Like a Woman
Add-on quests
Dead MoneySierra Madre Grand Opening! · Find Collars (8: "Dog", 12: Christine, 14: Dean Domino) · Fires in the Sky · Strike Up the Band · Mixed Signals · Trigger the Gala Event · Put the Beast Down · Last Luxuries · Curtain Call at the Tampico · Heist of the Centuries · Big Winner, Sierra Madre
Honest HeartsA Family Affair · Arrival at Zion · Bighorners of the Eastern Virgin · Chaos in Zion · Civilized Man's Burden · Crush the White Legs · Deliverer of Sorrows  · Departing Paradise · Flight from Zion · Gathering Storms · Gone Fishin' · Happy Trails Expedition · Prisoners of War · Retake the Bridge · River Monsters · Rite of Passage · Roadside Attraction · Sanctity of the Dead · The Advance Scouts  · The Treacherous Road · The Grand Staircase · Tourist Trap
Old World BluesAll My Friends Have Off Switches · A Brain's Best Friend · Coming Out of Her Shell · Field Research · He Came... And Went · Influencing People · Midnight Science Fiction Feature! · Old World Blues · On the Same Wavelength · Picking Your Brains · Project X-13 · Sonic Emitter Upgrade · Welcome to the Big Empty · What's in a Name? · When Visitors Attack! · X-2: Strange Transmissions! · X-8 Data Retrieval Test · X-8: High School Horror! · X-13: Attack of the Infiltrator!
Lonesome RoadThe Reunion · The Silo · The Job · The Launch · The Tunnelers · The Divide · The Courier · The End · The Apocalypse