Trinchera is an unincorporated community and a U.S. Post Office located in Las Animas County, Colorado, United States. The Trinchera Post Office has the ZIP Code 81081. A post office called Trinchera has been in operation since 1889. Trinchera is a name derived from Spanish meaning "trench". Geography Trinchera is located at (37.042847,-104.047565). References Unincorporated communities in Las Animas County, Colorado Unincorporated communities in Colorado