400 m, Women
| Competition | 1978 South American Athletics U18 Championships |
|---|---|
| Venue |
Montevideo
 URU
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Marcela López |  ARG |
57.38 | ||
| 🥈 | María Labarca |  CHI |
57.87 | ||
| 🥉 | Alejandra Vives | ARG |
59.28 |