To find the cache, you'll have to beat Dale Benson, local legendary card shark, at a hand of poker. He'll deal himself 5 cards off the top, (watch him closely, he's been known to stack the deck) and then he'll spread out 10 cards on the "table" for you. (The table is the Clear Creek Trail) You need to walk to each card's location and decide whether or not to use that card. Once you have the 5 cards of your choice, take them back to Dale and see how you did. If you beat Dale, he'll reveal where he's been hiding his poker winnings. (Don't get too excited over his winnings though, it would appear he has played a lot of poker at fast food joints against kids)
To complete the cartridge, you'll probably end up walking approximately one mile, maybe more depending on how lucky you are, so plan accordingly. Also, the trail is wheelchair accessible, and it's possible to complete the cartridge without leaving the trail, however the lock-n-lock hidden at the end is not handicap accessible.
Here's the ranking of poker hands from the highest to the lowest for reference.
Visit the Wherigo FAQ for more info on the Wherigo Cache Type.
This cartridge was built using the earwigo.net web builder and with great help from the forums there.
And it was beta tested with the help of MonsterCatAmbush and his Android phone running the WhereYouGo player.