In 2010, Williamson enjoyed a break out season with victories at Steelhead 70.3 and Branson 70.3 along with numerous other podium finishes. In 2011, Williamson has continued to dominate with early season wins at Rev3 Costa Rica and San Juan 70.3. In her first Ironman distance race last year, Williamson again finished on the podium and followed that performance with a 15th place at the Ironman World Championships in Kona Hawaii.