Born and raised in
Marcos Paz, Braian Toledo grew up in a small one-bedroom house with his mother and two younger brothers.
Athletics coach Gustavo Osorio gave a class at Toledo's school and invited him to join his training group. Initially focused on
football – the most prominent and potentially profitable sport in Argentina – Toledo made the decision to focus solely on
track and field instead at the age of twelve. He managed a
bronze medal at the
South American Youth Championships in 2008. However, it was at the
2009 World Youth Championships in
Brixen,
Italy that he first made a name for himself. This was enough to win him the bronze against boys a year older, just 56 centimetres from gold. Later in the year, he made large improvements to his personal best with the youth javelin, with his eventual best mark of 79.25, thrown in
Córdoba on 11 October, the top mark that year among throwers born in 1993 or later. This by a comfortable margin eclipsed the world youth best of 83.02, set the previous year by
Russia's
Valeriy Iordan. This mark was some 25 metres up from his personal best just a year before. He won the national youth title in September with a throw of 85.64 m (his second best ever) and in October he competed at the
South American Youth Championships, easily securing victory with the third best ever throw for a youth athlete. ==Junior career==