Klingelhoefer competed in the 60 metres event. He placed either fourth or fifth in his five-man first round heat and did not qualify for the final.
In the 200 metres, Klingelhoefer placed third in his semifinal heat and did not advance to the final.
Klingelhoefer did not finish his first-round heat of the 110 metre hurdles.
- De Wael, Herman. Herman's Full Olympians: "Athletics 1900". Accessed 18 March 2006. Available electronically at .
- Mallon, Bill (1998). The 1900 Olympic Games, Results for All Competitors in All Events, with Commentary. Jefferson, North Carolina: McFarland & Company, Inc., Publishers. ISBN 0-7864-0378-0.
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