Every winter, artists build a massive frozen kingdom on the shores of Dillon Reservoir. Ice Castles features towering frozen spires, winding tunnels, ice slides, fountains, and caverns - all constructed from hundreds of thousands of icicles grown and harvested by hand.
The experience transforms after dark when embedded LED lights illuminate the ice in shifting colors. Walking through the frozen caverns at night, surrounded by blue and purple glowing ice, feels like stepping into another world.
The castle typically opens in late December or January and runs through late February or March, weather dependent. Cold temperatures keep the ice solid; warm spells can close the attraction temporarily or end the season early.