The eighth South American Junior Championships in Athletics were held in Cali, Colombia, at the Estadio Olímpico Pascual Guerrero between October 9–12, 1970.

[1] Detailed result lists can be found on the "World Junior Athletics History" website.

[2] An unofficial count yields the number of about 194 athletes from about 9 countries: Argentina (35), Brazil (30), Chile (29), Colombia (33), Ecuador (16), Paraguay (2), Peru (21), Uruguay (5), Venezuela (23).

Medal winners are published for men[3] and women[4] Complete results can be found on the "World Junior Athletics History" website.

[2] * = another source[2] rather states: Hexathlon *   Host nation (Colombia)