Caroline made her New Zealand debut at the 2006 World Equestrian Games where she finished 26th. Together with her mount Lenamore, Caroline has continued to improve and impress since – going onto record a 23rd at Burghley in 2007 and 12th at the prestigious Badminton the same year. Lifting to another level, Powell and Lenamore were right up with the elite finishing fourth at the 2008’s Badminton
Selected for her second Olympic Games Caroline joined equestrian veterans Andrew Nicholson and Mark Todd and team mates Jonathan Paget and Jonelle Richards in securing a New Zealand three-day eventing team bronze medal at Greenwich Park. It was New Zealand's first medal of the 2012 London Olympic Games.