Find 10 caches after 04/22/2007 designated as Karma123's favorites
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AK - Alaska Challenge #1: Karma123's Alaskan Favorites (GC306AX)

Alaska Challenge #1: Karma123's Alaskan Favorites

Find all the caches in a series hidden by Blazingpathway
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AK - Alaska Challenge #2: Blazingpathways (GC30EPT)

Alaska Challenge #2: Blazingpathways

Find an Alaska cache published in each year, 2001 - Current Year
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AK - Alaska Challenge #3:  A Cache a Year (GC30EPV)

Alaska Challenge #3:  A Cache a Year

Find a cache on each calendar date
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AK - Alaska Challenge #4:  Leave NO day Uncached (GC30EQ2)

Alaska Challenge #4:  Leave NO day Uncached

Find 4 different cache types in one day
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AK - Alaska Challenge #5:  One Busy Day (GC30EQK)

Alaska Challenge #5:  One Busy Day

Find 10% of the caches hidden by cavyguy (122 as of 08/03/2011)
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AK - Alaska Challenge #6:  Cavyguy's 10% (GC30FAC)

Alaska Challenge #6:  Cavyguy's 10%

Find a cache a day for 25 consecutive days
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AK - Alaska Challenge #7:  Streaker's Challenge (GC30FAM)

Alaska Challenge #7:  Streaker's Challenge

Find 10 caches near Anchorage artwork
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AK - Alaska Challenge #8:  Anchorage Art(ifacts) (GC30FAR)

Alaska Challenge #8:  Anchorage Art(ifacts)

Find 20 caches in one calendar day
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AK - Alaska Challenge #9:  Another Busy Day (GC30FB7)

Alaska Challenge #9:  Another Busy Day

Find 49 Alaska caches whose GC codes contain designated digits

AK - Alaska Challenge Cache - Comfort Zone

Alaska Challenge Cache - Comfort Zone

Find 20 active Alaska Earthcaches  
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AK - Alaska’s Geology: An EarthCache Challenge (GC21QXG)

Alaska’s Geology: An EarthCache Challenge

Find 5 Alaskan caches where the sum of their elevations is greater than or equal to the summit of Denali


AK - Denali Summiteers Challenge Cache (GC1CNEG)

Denali Summiteers Challenge Cache

Find 9 caches of different Difficulty/Terrain combinations to score a designated BINGO on the D/T chart
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AK - Diagonal - Fizzy Challenge Bingo

Diagonal - Fizzy Challenge Bingo

Find a cache hidden on each calendar date

AK - Find a Cache for a year by PLACED DATE Challenge 

Find a Cache for a year by PLACED DATE Challenge

AK - Horizontal - Fizzy Challenge Bingo

Horizontal - Fizzy Challenge Bingo

Find an Alaska cache on each of 63 designated pages of the Alaska DeLorme Atlas; Webcam, Virtual, Event, Wherigo, Mystery caches excluded


AK - South Central Alaska DeLorme (GC17H9E)

South Central Alaska DeLorme Challenge

Find a cache in each of Alaska's 27 Boroughs and/or Census Areas; Event, CITO, Virtual, Webcam caches excluded
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AK - The Alaska Borough and Census Area Challenge (GCYPMN)

The Alaska Borough and Census Area Challenge

AK - Vertical - Fizzy Challenge Bingo

Vertical - Fizzy Challenge Bingo

Find 1000 Traditional caches
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AK - Zany Kilo Green Box Challenge Cache (GC1E39H)

Zany Kilo Green Box Challenge Cache

Find a cache a day for 100 consecutive days


AL - 100 Days of Caching Challenge (GC30ZM2)

100 Days of Caching Challenge

Caches, for U.S. States A-CA, that require you to find a certain number of other caches that meet specific criteria (plus a few exceptions.) Difficulty of the task varies.

See [url=http://coord.info/PR1DXMJ]my profile[/url] for additional U.S. Challenge Bookmark Lists

Help me keep it up to date by suggesting additions or corrections - [url=http://www.geocaching.com/email/?guid=92ceee60-5648-4432-b2aa-10069fb40ac7]Email me[/url] or rate the list.
Last updated 03/15/2013

U.S. Challenge Caches: States A-CA.list-details-1wr9x6v{text-transform:uppercase;font-size:12px;}@media screen and (min-width: 600px){.list-details-1wr9x6v{font-size:1.25rem;}}.list-details-1wr9x6v.shareable{color:#87705a;}.list-details-1wr9x6v.public{color:#00b265;}Public

U.S. Challenge Caches: States A-CAPublic