| Year | Title | Publisher | Prize Amount | Judge |
| 2020 | Deuda Natal/Natal Debt | University of Arizona Press | $1,000 | Pablo F. Medina |
Mara Pastor is the author of Deuda Natal / Natal Debt (University of Arizona Press, 2021), co-translated by María José Giménez and Anna Rosenwong, which won the 2020 Ambroggio Prize.