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Bay Area Quadrangle Challenge

A cache by mjp303 Send Message to Owner Message this owner
Hidden : 11/06/2006
4 out of 5
2 out of 5

Size: Size: regular (regular)

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Geocache Description:

Have you ever wished you had the time or resources to sytematically explore the Bay Area? I sure have! So here’s your motivation and opportunity:

The Bay Area Quadrangle Challenge

The objective of this challenge is to find a cache in each of 70 USGS 7.5 minute topographical map quadrangles surrounding San Francisco Bay.

This challenge will take you to the far reaches (…and everywhere in-between!) of one of the most spectacular places I know.

In order to complete this challenge and find the final cache, you must

  1. Find a cache in each quadrangle shown in the attached grid.
  2. Post a list of the caches you’ve found in each quadrangle as a note to the cache page or create a bookmark list (include the BAQC cache so that your list will show up on the cache page sidebar).
  3. Find the final cache using the coordinates provided in the waypoint list below.
  4. Log the cache on-line after the physical container is found and the logbook inside signed.
  5. I will review and verify the list. If I discover an issue, I will ask you to edit you on-line log until the situation is corrected.

Please note that the San Francisco South and Montara Mountain quadrangles have a non-standard shape.
In both these quadrangles there are strips of land along the coast (...containing caches!) that are west of W 122° 30.000. You may log these caches as part of those respective quadrangles.

Getting to the final cache:
As of April 2009, the cache is located in a scenic spot in a local park about 0.1 mile from the nearest parking. If you want to hike to the cache from further away, that is certainly possible.
If you want to park at the posted parking coordinates, pay the $6 (as of July 2014) to enter the park, or risk getting a ticket.

The guidelines:

  • Generally accepted rules, guidelines and conditions for logging a cache find apply. These must be bona fide caches listed on that you have personally (physically) found and logged.
  • All cache types count as finds with the exception of events (CITO included) and locationless caches.
  • For the purposes of this challenge, the coordinates listed on the cache page will determine which quadrangle puzzle and multi caches are located in, and not the coordinates of the actual physical cache.
  • The boundary of each quadrangle in the challenge is determined by the coordinates listed on the USGS quadrangle map of the same name. Please see the attached grids which can be used as a reference.
  • While you may have others with you when you find the final cache, only those who have fulfilled ALL criteria for this cache will be allowed to log it as a find. Find logs by other cachers will be deleted.
  • Remember that this is a game and is supposed to be fun!

Geocachers of the Bay Area logo

Additional Hints (Decrypt)

Abegu fvqr bs gerr

Decryption Key


(letter above equals below, and vice versa)



  • Map Grid
  • Quadrangle GridThis image shows the names and boundary coordinates of the 70 quadrangles in the challenge.

233 Logged Visits

Found it 73     Didn't find it 2     Write note 155     Publish Listing 1     Needs Maintenance 1     Owner Maintenance 1     

View Logbook | View the Image Gallery of 64 images

**Warning! Spoilers may be included in the descriptions or links.

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Last Updated:
Rendered From:Unknown
Coordinates are in the WGS84 datum

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Reviewer notes

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