Expanding her oeuvre, in 2010 Russell placed in the top three at the Jamaican High School in the 100 metres hurdles as well as her long jump speciality. Taking in combined track and field events, she entered the pentathlon at the 2010 CARIFTA Games and won by a margin of nearly 400 points. She still entered the long jump individually, and placed fourth. The Jamaican junior championships saw her win a long jump/400 metres sprint double. International junior medals followed at the 2010 Central American and Caribbean Junior Championships, where the 16-year-old Russell took the 400 m silver medal win a personal best of 53.68 seconds and helped the Jamaican 4×400 metres relay team to the gold medals. She was selected for the same events at the 2010 World Junior Championships in Athletics. Although she was a little slower in the 400 m individual event, being eliminated in the semi-finals, she won a medal with the Jamaican team, which ran its fastest time of the year (3:32.24 minutes) to claim the bronze medals. She competed internationally in her fourth different event of the season, choosing the long jump for the 2010 Youth Olympics and placing seventh in the competition.