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Mariana was born in Medellín.
Her parents are Carlos Mario Pajón y Claudia Londoño. -
In 1995 she started to make her first track workouts.n
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In 2000, when she was nine won her first title in a competition in Argentina.
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Mariana had an accident and her hand was broken into 8 pieces
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In 2008 she won the award of the
Colombia's best junior sportswoman -
In 2011 Mariana was named the athlete of the year
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When she was 21 years, she won a golden medal in the olympic games
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She meets her actual boyfriend in a competition in Antioquia.
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In 2013 she made an auction of the shirt that won the golden medal in the olympics
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She created a foundation named "pedaleando por un sueño "