Forbidden Zone Geocaches
 
   
 
FBZ Missions
 
 
  · Stone of the Lost Valley
· The Bunkers
· Mission Gorge
· Rock River Burial Mound
· Supernatural Supernova
· Little Green Men
· The Forbidden Zone
· The Doomsday Bomb
· The Monkey's Triangle
· Warlock Mine
 
 


 
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Journal Entries
 
 
 
· The Fool in the Rain [8/25/25]
· Reporting for Duty [2/24/25]
· Introduction [3/29/23] Normal.gif

[ More in Journal Section ]
 
 


 
Silverback Cipher
 
 
 
Silverback hunters should be familiar with the “pigpen” or masonic cipher, which is a simple substitution cipher exchanging letters for symbols based on a grid.

This cipher can be used to decrypt directions and secret codewords at FBZ geocaches!
 
 


 
External Links
 
 
  · 1: The CIA Vault
· 2: The FBI Vault
· 3: Project Blue Book
· 4: Aliens the Truth
· 5: The Black Vault
 
 


 << SGTF Special Operations
HQ-47
Geocaching Reference Number TB82Z9F

Worth 60 Points (Create an account to enter TB tracking number and earn points!)

 
HQ-47 Tracking Bug ImageThis mission intel (codename HQ47) is included in a TOP SECRET document at an undisclosed FBZ location. The tracking number can be discovered by operatives during their visit to a Top Secret Geocache (TSG) Forbidden Zone (FBZ) geocache in San Diego, CA.

Its discovery is worth 60 points towards an operative's rank on fbz.geocaches.org!
 
   
     

Operatives who have logged this TB...

  •  OESTEADO
  •  (Sun 10 Jul 2022 @ 18:17:06 BST; 1657473426 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  THEJJDUO
  •  (Fri 15 Jul 2022 @ 15:37:51 BST; 1657895871 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • First Sergeant NOBRO58
  •  (Fri 31 Mar 2023 @ 19:03:31 BST; 1680285811 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  FLAGMAN
  •  (Sat 03 Jun 2023 @ 17:07:19 BST; 1685808439 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  DICKANDALE
  •  (Thu 25 Apr 2024 @ 20:53:19 BST; 1714074799 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  MPARK65
  •  (Sun 19 May 2024 @ 15:08:27 BST; 1716127707 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  FEBONIOCLAN
  •  (Sun 19 May 2024 @ 21:52:39 BST; 1716151959 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  MAGICN3
  •  (Wed 12 Jun 2024 @ 13:05:18 BST; 1718193918 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  •  MIKE2FIND
  •  (Thu 20 Jun 2024 @ 5:39:57 BST; 1718858397 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
  • Warrant Officer One SIDIOUS
  •  (Sun 16 Mar 2025 @ 22:39:28 GMT; 1742164768 seconds since Unix Epoch (POSIX) 01 Jan 1970 00:00:00 UTC)
   

 
   Operation Silverback Prize Ring SILVERBACK Prize Rings

Those who create an account on fbz.geocaches.org and enter mission codewords and POTAM tracking bug numbers receive points towards an Operative ranking. Operatives who achieve the rank of General (700 points) are eligible to receive an official silver Operation Silverback GC.com trackable ring from Oakcoins. Gold rings are available for those who reach the rank of Green Beret (or higher).