Mexican Federal Highway 185
{{Short description|Highway in Mexico}}
{{ref improve|date=January 2018}}
{{Infobox road
|country=MEX
|type=FH
|route=185
|maint=Secretariat of Infrastructure, Communications and Transportation
|length_km=302.35
|length_round=2
|length_ref={{cite web|publisher=Dirección General de Servicios Técnicos, Secretaría de Comunicaciones y Transportes|title=Datos Viales de Oaxaca|url=http://dgst.sct.gob.mx/fileadmin/Viales_2011/20_OAXACA.pdf|format=PDF|year=2011|language=es|page=5|access-date=2012-03-17|url-status=dead|archive-url=https://web.archive.org/web/20120514182401/http://dgst.sct.gob.mx/fileadmin/Viales_2011/20_OAXACA.pdf|archive-date=2012-05-14}}
|alternate_name=
|established=
|direction_a=North
|terminus_a={{jct|state=VER|FH|180}} in Coatzacoalcos{{cite web|publisher=Dirección General de Servicios Técnicos, Secretaría de Comunicaciones y Transportes|title=Datos Viales de Veracruz|url=http://dgst.sct.gob.mx/fileadmin/Viales_2011/30_VERACRUZ.pdf|format=PDF|year=2011|language=es|page=2-3|access-date=2012-03-17|url-status=dead|archive-url=https://web.archive.org/web/20120514175732/http://dgst.sct.gob.mx/fileadmin/Viales_2011/30_VERACRUZ.pdf|archive-date=2012-05-14}}
|junction=
|direction_b=South
|terminus_b={{jct|state=OAX|FH|200}} in Salina Cruz
|counties=
|cities=
|previous_type=FH
|previous_route=184
|next_type=FH
|next_route=186
}}
Federal Highway 185 (Carretera Federal 185) is a Federal Highway of Mexico.{{cite web|url=http://dgp.sct.gob.mx/fileadmin/Atlas/turis2008.pdf|title=Mapa Nacional de Comunicaciones y Transportes|publisher=Secretaría de Comunicaciones y Transportes de Mexico|access-date=December 11, 2008|url-status=dead|archive-url=https://web.archive.org/web/20090126160054/http://dgp.sct.gob.mx/fileadmin/Atlas/turis2008.pdf|archive-date=January 26, 2009}} The highway travels from Coatzacoalcos, Veracruz in the north to Salina Cruz, Oaxaca in the south. It is also known as the Carretera Transístmica because it crosses the Isthmus of Tehuantepec. It crosses the Sierra Madre de Oaxaca at Chivela Pass.