|High School:||Institución Educativa SEK|
Mardones impressed during her freshman campaign, recording two top-eight times and one top-16 time at the 2013 MPSF Championships. She placed sixth in the 200 Breast (2:16.90) and seventh in the 400 IM (4:24.13), and came in 13th in the 200 IM (2:03.91). At the Pacific Invite, she took third in the 200 Breast (2:22.00), fourth in the 200 IM (2:09.14) and fifth in the 100 Breast (1:05.40). The UNLV Winter Invite saw Mardones win both the 200 IM (2:04.33) and the 400 IM (4:25.98) while coming in second in the 200 Breast (2:17.75) and fourth in the 100 Breast (1:04.78).
Mardones prepped at Institución Educativa SEK in Madrid, Spain. At the 2011 International School Sport Federation Cup in Malta in 2011, she finished with times of 58.83 in the 100 Free, 1:05.94 in the 100 Back, 1:12.30 in the 100 Breast, 2:38.18 in the 200 Breast and 2:20.40 in the 200 IM. Her marks in the 100 Free and 100 Breast were good for second, while she helped her IM relay squad to a third-place finishes.
Mardones was born in Bilbao, Spain, and is the daughter of Maria López-Abadia and Juan Mardones. She has a younger sister. Mardones will pursue a degree in bioengineering.