The towns of Blue River, Breckenridge, Dillon, Frisco and Silverthorne have narrowly defined geographical borders.  Their rules obviously apply only to properties falling within their specific boundaries.  A surprising number of properties nearby to Blue River, Breckenridge, Dillon, Frisco and Silverthorne are actually outside official town borders and are instead located in unincorporated portions of  Summit County.  And, Summit County short-term rental rules differ significantly, dependent upon where a particular property is located.  As a result, it’s extremely important to understand which local governmental jurisdiction controls a potential short-term rental property in Summit County. If you’re unsure whether a property is located within a particular town or instead in unincorporated Summit County, there’s a quick way to figure it out. Go online to the Summit County GIS tool Accept the County disclaimer. Enter the property address. Once the property appears at the bottom of the page, the bottom-left-corner field will say “Jurisdiction”.  It will tell you if the property is subject to the short-term rental rules of a specific town (Blue River, Breckenridge, Dillon, Frisco and Silverthorne) or instead if it is in unincorporated Summit County.