Posted by: Rebecca Whitham, Communications What did you do for your 20th birthday? Photo by Ryan Hawk/Woodland Park Zoo. Today, grizzly brothers Keema and Denali celebrated two decades by diving face-first into piles of snow courtesy of Crystal Mountain Resort. Hidden inside the snow were special birthday treats, from meaty knuckle bones and fish, to peanut butter and marshmallow fluff. Video: Grizzly bear snow battle. Produced by Ryan Hawk/Woodland Park Zoo. Though the bears technically turned 20 back in January , they slept right through their big day as bears tend to do during their winter slumber. So we held off on their birthday surprise until today. Photo by Ryan Hawk/Woodland Park Zoo. This morning, our friends from Crystal Mountain trucked in piles of snow fresh from the Cascades and loaded it into the exhibit. Keepers and volunteers lovingly tucked Keema and Denali’s favorite treats into the snow. Between the smell of the food and the feel of the soft