In order to claim a find on this challenge, you must find and log 5 of the oldest caches in Michigan. Each must be one of 8 different types. The types are traditional, mystery, multi, earth, virtual, wherigo, webcam, and letterbox. Here is the list of currently active oldest caches of each type:
Traditional GC35 Power Island hidden 2000-07-16
Virtual GC557 Entmoot hidden 2001-03-25
Multi-cache GCCE1 2 Bridges Cache hidden 2001-06-18
Unknown Cache GC8584 Your Own Birthday Cache hidden 2002-08-26
Letterbox Hybrid GCH0M9 Peace with Nature hidden 2003-09-27 OR
Letterbox Hybrid GCH0M3 Eugene the Fortunate hidden 2003-09-27
Webcam GCH48P Middle of the Mitten WebCam Cache hidden 2003-10-25
Earthcache GCNR7Z Detroit Salt Mines hidden 2005-05-16
Wherigo Cache GC19YBV Buck Creek Trail hidden 2008-03-05
Cachers may sign a challenge cache's physical log at any time. However, the challenge cache may be logged as found online only after the log is signed and the challenge tasks have been met and documented. Finds on sufficiently old caches that are now archived will count as qualifiers. The checker below will tell you if you qualify.
Contact bgscrabble if you would like this challenge in your state or province. Here is a link to existing Oldest by Type challenges.
Oldest Caches by Type Challenges
Thanks to LaLang who created a list of the oldest by type for US and Canada states and provinces. One way to see the oldest by type in your state/province is to map this list then zoom in on your area. This list may be outdated. Contact the list owner if you see that it needs to be updated.
Oldest Caches by Type in each state/province
Don't forget Cache In Trash Out.