He was named the American Champion Turf Horse of 1961 after winning the Santa Catalina, Los Angeles, Hawthorne Gold Cup and Knickerbocker Handicaps and the Washington, D.C. International Stakes.
In 1960, as a three-year-old, he won the California Derby, but on April 2, 1960, William Molter died unexpectedly of a heart attack and Paul Parker, a former groom of T.V.
The horse did not run in the Kentucky Derby, and in the Preakness Stakes finished a disappointing 6th behind winner Bally Ache.
Lark won several top races and broke the track record on the turf while defeating the great Kelso in the prestigious Washington, D.C. International.
Lark was retired to stand at stud at owner Preston Madden's Hamburg Place farm in Lexington, Kentucky.