The Town of Breckenridge is the Home Rule Municipality that is the county seat and the most populous municipality of Summit County, Colorado, United States. The town population was 4,540 at the 2010 United States Census. The town also has many part-time residents, as many people have vacation homes in the area. The town is located at the base of the Tenmile Range. Since ski trails were first cut in 1961, Breckenridge Ski Resort has made the town a popular destination for skiers.