Vanessa Macias Arrested -- Former 'Amazing Race' Contestant Popped for DWI

Vanessa Macias -- part of the Dating Divorcees team on last season's "Amazing Race" -- was arrested in Texas early Friday morning for driving while intoxicated ... TMZ has learned.

32-year-old Macias -- who came in 4th place on "Race" -- was pulled over by the San Antonio Police Department around 2 AM on October 26. During the stop, officers claim they detected the presence of alcohol.

Macias was arrested and hauled to a nearby station where she was booked for misdemeanor DWI -- and posed for an extremely wide-eyed mug shot.

Macias was released a few hours later after posting $1,000 bond.

A rep for Vanessa tells TMZ ... the former reality star feels extremely remorseful over the arrest.