The program featured holiday music played by the U.S. Air Force Band.
This year's tree is from the White River National Forest near Meeker.
The 65-foot Engelmann Spruce traveled more than 5,000 miles to arrive at the Capitol last week.
It's decorated with 10,000 lights and thousands of ornaments made by the people of Colorado.
The theme for this year's tree is "Celebrating our Great Outdoors."
The tree will be lit each night from dusk until 11 p.m. through Dec. 26.
(Copyright 2012 by The Associated Press. All Rights Reserved.)