A couple of fun online snowboarding games are "Santa's Snow Rush" and "Shaun White Will Eat You." Both games are found at PlaySnowboardingGames.com to play for free.
In "Santa's Snow Rush," the player helps Santa Claus gather toys out on the snow. As a reindeer pulls Santa through the snow, the player uses keys to move Santa left and right to hit the presents while avoiding the bombs.
Players must hit as much food as possible on the way down a hill in "Shaun White Will Eat You." The players can flip and perform tricks with their skier as he makes his way down hill. The player gets timed on the way down and must eat enough food to keep going.