Hannes Kolehmainen, in winning the first semifinal, set the Olympic record at 33:49.0. It lasted until the next race, in which the time was beat by Len Richardson. Kolehmainen took back the record with a time of 31:20.8 in the final.
Results
Semifinals
All semi-finals were held on Sunday, July 7, 1912.
Bergvall, Erik (ed.) (1913). Adams-Ray, Edward (trans.). (ed.). The Official Report of the Olympic Games of Stockholm 1912. Stockholm: Wahlström & Widstrand. {{cite book}}: |first= has generic name (help)