Cornelius Warmerdam, affectionately known as "Dutch," was born on June 22, 1915, in Long Beach, California, to Dutch emigrants Adrianus and Gertrude Warmerdam. Growing up in Hanford, California, he discovered his passion for pole vaulting in his backyard, using a peach tree limb and a dirt pit as his makeshift training ground. His talent was soon recognized by a local track coach, leading him to compete for Hanford High School and later for Fresno State College.
Warmerdam made history as a pole vaulter, becoming the first athlete to clear fifteen feet, achieving this remarkable feat on April 13, 1940, at UC Berkeley. Although his initial jump was not ratified as a world record, his subsequent vault of four point six meters on June 29, 1940, marked the first official record over fifteen feet. Throughout his career, he surpassed the pole vault record seven times within a four-year span, with three of those marks recognized as world records. His highest outdoor vault of fifteen feet seven and three-quarters inches was set at the Modesto Relays in 1942 and remained unbroken until 1957.
Despite his extraordinary achievements, Warmerdam's Olympic dreams were thwarted by World War II, as the 1940 and 1944 games were canceled. By 1948, he had transitioned to coaching, which rendered him ineligible to compete. Nevertheless, he continued to participate in Masters athletics and remains ranked among the world’s top ten in the M60 Decathlon.
After retiring from competitive vaulting in 1944, Warmerdam dedicated his life to coaching track and field at Fresno State University until his retirement in 1980. His contributions to the sport were honored when Fresno State named its track stadium Warmerdam Field. He was inducted into several halls of fame, including the National Track and Field Hall of Fame and the Millrose Games Hall of Fame.
Warmerdam married Juanita Anderson on August 29, 1940, and they shared a loving partnership for sixty-one years until his passing in 2001 due to Alzheimer's disease. The couple left behind five children and twenty grandchildren, with Juanita continuing to reside in Fresno until her death in 2006.