Challenging Meta-Challenge for Challengers Mystery Cache

Congratulations to Sharknose Bunnies on the FTF!

The Rules

• Previous finds count.
• Caches meeting Groundspeak's criteria for an acceptable challenge cache, as well as any grandfathered challenges that don't meet those criteria are acceptable. (How many lawyers does Groundspeak have on hand to be able to come up with a list like that?)
• Please either list the challenges you're using for this challenge in your log along with the date you found the final and a link to the cache page or the GC number, or create a public bookmark list with the same information. Below is a sample log showing challenges I've found.
• If you're looking for ideas for challenges you can complete, the list below has some. (I limited myself to challenges in Minnesota to make this more local-friendly.) Beyond that, I recommend this bookmark list for a list of challenges broken down by state.
• If you're not sure whether or not a cache qualifies as a challenge, drop me a line and I'll let you know what I think. The lack of the word "challenge" in the cache title does not necessarily mean a cache isn't a challenge, nor does the presence of the word necessarily mean that a cache is a challenge. For example, I'd say every cache in The Geo-Stalker Series qualifies as a challenge. Along those lines, the current Groundspeak rules distinguish "series" caches (where you have to find several caches with codes in them before getting a final) and "challenges." There are some old challenges that wouldn't be allowed today, but were acceptable challenges at the time, and they qualify for this challenge. The Hard Hat Challenges for the American League and National League are examples of this. I'm also leaning towards including "final" caches in tough series of puzzle caches. At this point, I'll say this includes the KIDDIE LITter Final, the History Series Final, my Music Series Final, the State Symbol Final, the Sports Penalties Final, and the World Series of the Hard Hat Challenge. I'm not inclined to allow series caches, unless they're grandfathered challenges.
• Each of the "Lucky Seven" caches (both for types and sizes), as well as the final cache in each series, counts as a separate challenge.
• You cannot include your own challenge caches to qualify for this one.
• The following are acceptable as grandfathered challenges: The Old-Timer Challenge: D.O.A., Minnesota Challenge: Historic Caches
• The following challenges are acceptable: Minnesota Challenge: Lucky Thirteen, Series Caches: The KB 100 Challenge, The KB Challenge: Oldies But Goodies
• I reserve the right to modify these rules as new situations develop and are presented to me, and to delete logs that don't meet the requirements. Please keep in mind the spirit of the challenge!

Sample Log

Here are my 100+ qualifying challenges:

1. Minnesota County Challenge, 5/31/09
2. Minnesota DeLorme Challenge, 10/11/09
3. Minnesota County Seat Challenge, 11/01/09
4. Minnesota Challenges: A Baker's Dozen, 1/1/11
5. Minnesota Challenge: County Parks, 4/23/10
6. Minnesota Challenge: Lonely Caches, 8/30/09
7. Minnesota Challenge: Prolific Cache Owners, 5/17/11
8. Minnesota Challenge: Streak, 3/20/11
9. Minnesota Challenge: City Parks, 3/29/09
10. The KB Challenge: Minnesota Baker's Dozen, 10/5/08
11. Minnesota Challenge: Double Your Pleasure, 4/29/11
12. Minnesota Challenge: Game Trail, 12/29/10
13. Minnesota Challenge: SOC, 1/1/11
14. Alphabet Challenge: FTF Style, 9/4/10
15. Minnesota Challenge: Alphabet Lakes, 7/24/10
16. Alphabet Soup in a Day Challenge, 11/28/10
17. Alphabet Cities Challenge - MN, 4/29/10
18. Multicache Madness: Alphabet Challenge, 11/6/10
19. The KB Challenge: Alphabet Puzzles, 8/2/09
20. A Bobcam Challenge: A Through Z, 1/8/10
21. The KB Challenge: Reverse Alphabet Soup, 4/29/10
22. Challenge of a Century: Virtual, 5/18/11
23. Challenge of a Century: Multi, 4/25/11
24. The KB Challenge: 100 Caches, 1 Day, 5/23/11
25. Minnesota Challenge: 100 Caches, 1 Day, 5/14/10
26. Challenge of a Century: Streak, 12/29/10
27. Challenge of a Century: Mystery, 4/22/09
28. Challenge of a Century: Cache Owners, 9/18/10
29. Challenge of a Century: DNF, 10/5/09
30. Challenge of a Century: Mississippi River, 8/7/10
31. Challenge of a Century: Counties, 7/31/10
32. Challenge of a Century: Cities, 8/27/10
33. Challenge of a Century: Minneapolis Parks, 4/12/11
34. The KB Challenge: 100 Stars, 1 Day, 8/2/09
35. January Challenge, 11/28/10
36. March Challenge, 12/29/10
37. April Challenge, 11/7/10
38. May Challenge, 4/4/11
39. June Challenge, 6/5/11
40. July Challenge, 11/1/10
41. August Challenge, 5/31/10
42. September Challenge, 2/8/11
43. October Challenge, 10/21/10
44. December Challenge, 10/28/10
45. KIDDIE LITter Final, 7/18/09
46. History Series Final, 7/18/09
47. Challenge of a Century: NGS Benchmarks, 6/16/11
48. Challenge: Benchmark a Day, 31 Days, 6/10/11
49. Unlisted Benchmark Challenge, 9/5/09
50. Geo-Stalker Series: 1 (the newbie hider), 9/5/09
51. Geo-Stalker Series: 2-4, 9/5/09
52. Geo-Stalker Series: 5-9, 11/1/09
53. Geo-Stalker Series: 10-19, 4/17/11
54. Geo-Stalker Series: 20-29, 4/17/11
55. Geo-Stalker Series: 30-44, 4/17/11
56. Geo-Stalker Series: 45-69, 9/5/09
57. Geo-Stalker Series: 70-99, 4/17/11
58. Challenge: Blackout, 11/28/10
59. Traveler's FTF Challenge, 10/24/10
60. FTF Icon Challenge, 8/8/10
61. Challenge: Geocaching BINGO, 12/21/10
62. The KB Challenge: Alphanumeric Cachers, 11/5/10
63. Same Day 7 Challenge, 5/23/10
64. Challenge: Degrees of Difficulty, 6/10/11
65. U.S. Challenge: A Cache a Year, 9/18/10
66. Lucky Seven Virtual Challenge, 3/29/09
67. Lucky Seven Traditional Challenge, 3/29/09
68. Lucky Seven Mystery/Puzzle Challenge, 8/2/09
69. Lucky Seven Multi-Cache Challenge, 3/29/09
70. Lucky Seven Letterbox Hybrid Challenge, 8/2/09
71. Lucky Seven Event Challenge, 8/2/09
72. Lucky Seven Earthcache Challenge, 8/2/09
73. Lucky Seven: Geocaching Types Challenge, 8/2/09
74. Lucky Seven: Small Challenge, 12/28/08
75. Lucky Seven: Regular Challenge, 12/28/08
76. Lucky Seven: Unknown Challenge, 12/28/08
77. Lucky Seven: Large Challenge, 12/28/08
78. Lucky Seven: Micro Challenge, 12/28/08
79. Lucky Seven: Geocache Size Challenge, 12/28/08
80. Two County Challenge, 1/19/11
81. The KB Challenge: Earthcache Platinum, 5/16/11
82. Evil Smiley Challenge, 5/28/11
83. 45° Challenge, 7/29/10
84. White Belt of Geocaching Challenge, 5/20/11
85. The KB Challenge: Longest Streak vs. Longest Slump, 5/23/11
86. Icon Challenge, 7/18/09
87. Geo Earth Art Challenge, 8/2/09
88. The KB Challenge: Jukebox Hero, 9/5/09
89. The KB Challenge: It's All About You!, 8/30/09
90. Palmer Lake Challenge, 4/30/11
91. The KB Puzzle Yammer, 5/24/11
92. The Challenge of Ten Centuries: Traditional, 8/2/11
93. Minnesota Challenge: Cache Assistance 12 Pack, 10/30/10
94. One Long Log Challenge, 10/5/08
95. State Symbol Final, 12/29/10
96. Sports Penalties Final, 9/30/10
97. The KB Challenge: Alphanumeric Caches, 4/4/11
98. Minnesota NFL Challenge: Team Mascots, 2/20/11
99. Minnesota Challenge: A Cache A Year, 10/1/08
100. 5-Clique of Puzzlers, 7/6/11
101. 6 Degrees of Separation, 7/6/11
102. 9-Cycle of Multi-Caches, 7/6/11
103. 10 By 10K, 7/6/11
104. 4 States in a Day, 7/25/11
105. 35 Smileys, 7/26/11
106. US Challenge: Alphabet Counties, 7/30/11
107. Challenge of a Century: Specific NGS Benchmarks, 8/13/11
108. Challenge: Test of Terrain, 8/27/11
109. U.S. Challenge: Lucky Thirteen (Souvenirs), 8/30/11,
110. The KB Challenge: 365 Calendar Days, 8/30/11
111. A Cache A Day... for 365 Days?, 8/30/11
112. Challenge: Get to know your fellow cachers, 8/31/11
113. Minnesota Challenge: Lucky Thirteen, 9/8/11
114. A Year of FTFs? A Challenge Cache!, 9/21/11
115. The Grey Wolf Trifecta, 10/17/11
116. Cache of the Month Challenge, 11/9/11
117. Geocacher's Name Challenge, 11/21/11
118. November Challenge, 11/21/11
119. Green Belt of Geocaching Challenge, 11/21/11
120. Platinum Members Only, 11/21/11
121. April Challenge (#2), 11/25/11
122. Challenge of a Century: High Terrain Caches, 11/26/11
123. Minnstars Challenge: The 100 A Month Club, 11/27/11
124. Road Trip Challenge, 12/22/11
125. Geo-Stalker Series: 100 to 149, 12/24/11
126. Geo-Stalker Series: 150 plus (the prolific hider), 12/24/11
127. Geo-Stalker Series: Final, 12/24/11
128. 12 Month Challenge, 1/2/12
129. Confederate Generals Challenge, 1/22/12
130. Union Generals Challenge, 1/22/12
131. 7 x 7 Challenge: Caches that We Love to Hate, 1/28/12
132. Animal Challenge - One for the Kids, 2/10/12
133. Parts of Speech SHR Challenge, 2/12/12
134. A Bobcam Challenge: Size Does Matter, 2/28/12
135. Traveler's Challenge: Letterboxes, 2/29/12
136. Challenge: PuzzleMonth, 2/29/12
137. 1X2X10 Challenge, 3/8/12
138. 7 County Challenge, 3/8/12
139. 1X2X5 Challenge, 3/8/12
140. 7 County Mystery/Unknown Cache Challenge, 3/8/12
141. Cache Every Date Challenge - 80%, 3/8/12
142. Cache Every Date Challenge - 100%, 3/8/12
143. Cache Every Date Challenge - 60%, 3/8/12
144. Boys' Names Challenge, 3/17/12
145. Girls' Names Challenge, 3/17/12
146. Challenge: Double Your Pleasure (Counties), 3/22/12
147. Periodic Table of Elements Challenge, 3/23/12
148. The KB Challenge: Distance to Finds, 3/25/12
149. Minnesota Challenge: Comfort Zone, 3/25/12
150. The 1K Puzzle Club Challenge, 3/26/12
151. Cache Every Date Challenge - 40%, 4/13/12
152. All Sizes in One Day Challenge, 4/24/12
153. Challenge of a Century: Hides, 4/29/12
154. Challenge: Spell Your Name, 5/3/12