[1][2] In 2000, she became the first Chilean archer to compete at the Summer Olympics, but after failing a drug test in 2002 she left archery to study law.

In the removal round, she had to face Sayoko Kawauchi (Japanese, sixth in the standings with 654 points), and lost the match by 151 to 146.

In 2002, van Lamoen had an outstanding participation at the VII South American Games held in Brazil, where she earned 7 medals (6 gold and 1 silver).

In Venezuela, in 2004, van Lamoen won four gold medals and one silver, achieving 4 Panamerican records, which were recently beaten in 2010.

After a break of two years to resume her studies, van Lamoen returned to competition in 2009, beating four Chilean records.