Pippa Middleton Completes Blenheim Triathlon While Prince William & Catherine Attend Derby Day

Pippa Middleton approaches the finish line during the GE Blenheim Triathlon at Blenheim Palace in Woodstock, England, on June 4, 2011 Pippa Middleton approaches the finish line during the GE Blenheim Triathlon at Blenheim Palace in Woodstock, England, on June 4, 2011

So that’s how she keeps her buzz-worthy booty in tip-top shape!

Pippa Middleton, younger sister of Catherine, Duchess of Cambridge, participated in a team relay run in the GE Blenheim Triathlon in Oxfordshire, England, on Saturday.

The royal bridesmaid, 27, sporting a gray tank, gray shorts and sunglasses, finished the 5K run with a time of 25:30, according to the UK’s Daily Mirror.

Pippa ran into a bit of trouble after a near collision with a shirtless man who was running alongside her, but did not lose her footing.

Prince William and his wife, Catherine, were not on hand for Pippa’s big finish. The royal couple instead made an appearance at the Investec Derby Day to support Queen Elizabeth’s prized racehorse, Carlton House, along with Prince Harry.

The derby marked the royal newlywed’s first public outing since they returned from their Seychelles honeymoon on May 21.

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