Sandra Wallenhorst (born 1972) is a professional triathlete from Germany.

She competes in the World Triathlon Corporation's (WTC) Ironman and Ironman 70.3 triathlons.

Sandra's time of 8:47:26 at Ironman Austria 2008 was the fastest women's time in the world in the WTC Ironman 2008 series, where 6,223 women finished.

(286 professionals + 5,937 amateurs) [1]

This biographical article related to a German athlete known for competing in triathlons is a stub.