"Key to the Past" is a significant quest in Fallout 76, part of the game's main storyline. It becomes available after completing the "Flavors of Mayhem" quest, and it involves locating key fragments to unlock a Raider Cache. This guide will walk you through the objectives and locations necessary to complete the quest.
Prerequisites
Complete "Flavors of Mayhem": This quest must be finished before starting "Key to the Past."
Speak to Rose: After completing "Flavors of Mayhem," speak to Rose on the third floor of the Top of the World to initiate "Key to the Past".
Quest Objectives
Check the Terminal at Blackwater Mine:
Travel to Blackwater Mine, located south of Top of the World near Whitespring Resort.
Use the terminal inside to complete the objective.
Find the Blackwater Bandit's Key Fragment:
Enter the mine and kill Freddie Lang to obtain the Blackwater Bandit's Key Fragment.
Find the Trapper's Key Fragment:
Head to the Trappers' Camp near Devil's Backbone.
Locate Walter Griswold and obtain the Trapper's Key Fragment.
Check Margie's Last Known Location for Clues:
Find Margie McClintock's Holotape at Sunnytop Ski Lanes to gather information.
Duplicate the Diehard's Key Fragment:
Go to the Palace of the Winding Path and find the Palace Admin Password in a dresser.
Use the Holotape Duplication Terminal to duplicate the Diehard's Key Fragment.
Find the Gourmand's Key Fragment:
Search Bolton Greens for notes leading to the Gourmand's Key Fragment.
The fragment is located in the Wendigo Cave; kill the Wendigo to obtain it.
Kill David and Get the Cutthroat's Key Fragment:
Travel to Big Fred's BBQ Shack and kill David Thorpe to get the Cutthroat's Key Fragment.
Bring the Key Fragments to Rose:
Return to Rose at Top of the World with all the key fragments.
Go to the Raider Cache:
Head to Pleasant Valley Ski Resort. The key to open the cache is supposed to be under the welcome mat, but there have been reports of this not being the case.
Locations Involved
Blackwater Mine
Devil's Backbone (Trappers' Camp)
Sunnytop Ski Lanes
Palace of the Winding Path
Bolton Greens
Wendigo Cave
Big Fred's BBQ Shack
Pleasant Valley Ski Resort
In Fallout 76, successfully completing quests like "Key to the Past" rewards players with valuable items and resources, such as Fallout 76 caps. These caps are essential for trading with vendors and purchasing crucial supplies for surviving in the post-apocalyptic world, such as food, water, and ammunition. The completion of this quest not only provides access to the Raider Cache, which can contain additional resources and caps, but also progresses the game's narrative and opens up new opportunities for character development and exploration.

Known Issues
Key Fragments Lost: There have been reports of key fragments being lost upon logging out or disconnecting from the game.
Key Not Under the Mat: Some players have reported that the key to open the Raider Cache is not under the welcome mat at Pleasant Valley Ski Resort.
"Key to the Past" is a challenging quest that requires exploration and combat across various locations in Fallout 76. By following these steps and being aware of potential issues, you can successfully complete the quest and unlock the Raider Cache.
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