The Town of Silverthorne is a home rule municipality in Summit County, Colorado. According to the 2020 Census, the population of the city is 4,402. The town was named for Judge Marshall Silverthorn who served as the judge of the miners' court in Breckenridge. The judge first came to town as a prospector and claimed a section of the Blue River in 1881. After patenting his claim in April 1882, he was disappointed to find the gold to be sparse and the claim a poor bet.