The World Record for “FASTEST TO COMPLETE 50 KM ULTRAMARATHON (TEENAGER)” was achieved by ARJUN K. SIVEEJ on 7th December 2025 from Mysuru, Karnataka, India. 16 years, 7 months, and 4 days old Arjun K. Siveej, a student of Jnanodaya Pre University College, completed an ultramarathon, covering 50 km in 7 hours, 37 minutes, and 38 seconds and has set a new world record for International Book of Records.
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