River Monsters is a main quest in the Fallout: New Vegas add-on, .
In order to flee
Zion Canyon, the Sorrows must escape through Pine Creek Tunnel; however, a den of yao guai is situated near the only bridge that leads to Pine Creek Tunnel, and Daniel wants the yao guai gone.
Deal with the yao guai in the yao guai cave. This can be done by:
Killing the yao guai that block the road in order to get through, or
Destroying the yao guai cave by activating the mining explosives inside and triggering them with the mining detonator once outside.
Stage Status Description 10 Deal with the yao guai at Pine Creek. 35 (Optional)Collapse the yao guai cave 36 Plant mining explosives at key points within the cave. 37 Leave the cave and set off the charges with the mining detonator. 38 (Optional) Kill the yao guai at Pine Creek.
Even if you kill the yao guai in the cave before this quest, they may respawn. If they did not, the only way to complete the quest is to plant the explosives.
You may need to look closely for the charge markers, as they blend in with the cave floor making them difficult to see in the dark.
If you plant the explosives in the cave without triggering them, and then kill the yao guai at Pine Creek, the quest will be completed and you will not be able to detonate the planted explosives.
Waking Cloud will comment that it is very dangerous to directly attack the yao guai at Pine Creek. You can reassure her, but she will be skeptical.
Act 1 Ain'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 2 Wild 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 3 No Gods, No Masters · All or Nothing · Veni, Vidi, Vici · Eureka!
Other Come 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 quests ED-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 quests A Bit of Slap and Tickle · Access Powers · All Fired Up! · 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 · Flogging a Dead Corpse · Friend of the Followers · Getting a Leg Up from Andy · 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 · Not Worth a Hill of Corn and Beans · Of Boomers and Education · 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 · Proper Burial · Razzle Dazzle! · Reach for the Sky, Mister! · Rest and Resupply · Ringo's Caravan Rules · Rotface's Loose Lips · The Screams of Brahmin · Silus Treatment · Short-Term Treatment · Smooth-Talking Criminal · Strategic Nuclear Moose · Straus Calls · Strip Search · Saving (or Savaging) Sergeant Teddy · Stocking Up · Suits You, Sarah · A Team of Moronic Mercenaries · Team Spirit · The Thorn Mayhem · 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 ( I, II, III, IV) · Wind-Brahmin Wrangler · You Gotta Break Out a Few Eggs · You Make Me Feel Like a Woman Cut quests Auto-Inject Quest · Bright and Shiny · Chip Provenance · Debug Topics · Jailhouse Rock · Meat of Champions (quest) · TempMan · The Thorn Mayhem · Underpass Water Purifier · Viva Las Vegas! · Welcome to Fabulous New Vegas