Owned by trainer Robert Collet, after her first two starts Megahertz was sold to a racing partnership and her training was taken over by Nicolas Clement.
At the end of the year she was sold to American Michael Bello who brought her to the California stable of Bobby Frankel.
Megahertz made her first start in the United States on January 9, 2002, winning the Blue Norther Stakes at Santa Anita Park.
Retired from racing, Megahertz was bred to Giant's Causeway and produced a colt named Causeithertz on February 18, 2007.
At the November 2007 Keeneland Sales, owner Michael Bello sold Megahertz in foal to Bernardini for $2.1 million to Roy and Gretchen Jackson's Lael Stable.