Opening date: December 1, 1990
Closing date: 10 December 1990
The growing importance of the South American Games was confirmed in 1990. On 1 December, Alberto Fujimori, President of Peru, declared open the fourth edition of the games in a magnificent ceremony at the National Stadium in Lima. Once again, ten countries joined the event. Colombia was absent, but Suriname made its debut in the South American Games. The number of athletes continuously grew: 1,070 were to Lima and the cities of Arequipa and Trujillo and competed in 16 sports: artistic gymnastics, athletics, baseball, bowling, boxing, cycling, fencing, judo, swimming, table tennis, taekwondo, tennis, sailing, archery weightlifting and struggle. Argentina won 187 medals - 68 the gold - the conquest of the position in the top of the lists once more. Peru, competing at home, came in second position with a total of 185 medals - 50 of gold - followed by Chile with 138 gold medals - 40.