| XXXI South American Junior Championships in Athletics | |
|---|---|
| Dates | October 22–23 |
| Host city | Concepción, Chile  |
| Level | Junior |
| Events | 43 |
| Participation | about 278 athletes from 11 nations |
The 31st South American Junior Championships in Athletics were held in Concepción, Chile from October 22–23, 1999.