Trinidad is a Home Rule Municipality that is the county seat and the most populous city of Las Animas County, Colorado, United States. The population was 9,096 as of the 2010 census, up slightly from 9,078 in 2000. The estimate as of 2012 was 8,771. Trinidad lies 21 mi north of Raton, New Mexico, and 195 mi south of Denver. Trinidad is situated on the historic Santa Fe Trail.