BRECKENRIDGE, Colo. (CBS4) – Work is currently underway to build the 12-foot tall, 20-ton blocks of snow for the annual snow sculpture contest in Breckenridge.

(credit: CBS)

(credit: CBS)

Volunteers jumped into metal boxes to stamp down all the snow to make sure it’s perfect for carving for the International Snow Sculpture Championships.

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PHOTO GALLERIES: International Snow Sculpture Championships 2013 | 2012

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The sculpting starts the Jan. 27 and the winners are chosen Jan. 31.

(credit: CBS)

(credit: CBS)

It’s the 25th year for the championships.

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LINK: International Snow Sculpture Championships