Barrios competed only in the women's 50 m freestyle at the 2000 Summer Olympics in Sydney. She achieved a FINA B-cut of 27.22 from the Pan American Games in Winnipeg, Manitoba, Canada. She challenged seven other swimmers in heat four, including Russian import Yekaterina Tochenaya of Kyrgyzstan, and Yugoslavia's two-time Olympian Duška Radan. She saved a seventh spot over Guinea's Aissatou Barry by a wide margin of 7.68 seconds in 28.11. Barrios failed to advance into the semifinals, as she placed fifty-second overall out of 74 swimmers in the prelims.