400 m, Women
| Competition | 1977 South American Athletics U18 Championships |
|---|---|
| Venue |
Rio de Janeiro
 BRA
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Sueli Machado | BRA |
55.55 | ||
| 🥈 | Marcela López |  ARG |
55.89 | ||
| 🥉 | Cecilia Rodríguez |  CHI |
58.67 |