Summit County, Colorado has free shuttle service that takes you to Dillon, Frisco, Keystone, Breckenridge, and Silverthorne. If you decide not to rent a car when you fly into Denver International Airport then you might want to catch a ride with the Colorado Mountain Express (CME). CME has a booth at the Denver airport, and they will take you to the doorstep of the Silverthorne Lodge. They will also come pick you up at the doorstep when it’s time to leave. Here is Colorado Mountain Express’ website: http://www.coloradomountainexpress.com/