A brother-sister team from Wisconsin braved 40-below-zero wind chills in the dark early Wednesday to win the St. Paul (Minn.) Winter Carnival Treasure Hunt.

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Andrew Burke, 21, of Knapp, Wis., and his sister, Jessica French, 26, of Baldwin, Wis., won $10,000 plus $1,200 in groceries for finding the medallion hidden in St. Paul's Mounds Regional Park under a fallen tree shortly after midnight, reported the St. Paul Pioneer Press, which sponsored the 57th annual mid-winter treasure hunt.

The siblings, in just their second year trying their hand at the competition, found the medallion, wrapped in a 3M Highland Invisible Tape carton and wrapped in plastic, soon after the newspaper published the 11th clue of the 12-clue hunt.

Burke, a University of Wisconsin-Stout student, told newspaper officials he was "excited, stoked" when he realized their good fortune. He said he and his sister had spent up to eight hours a night searching for the medallion.

"A lot of clues still don't make a lot of sense to me," Burke said.