 In early September 2000, Keizer, with the help of his team (known as the ‘Dog Team'), set out to break the Mighty Mountain Megamarathon record.During his record-breaking attempt, Keizer unintentionally fell asleep on the trail three times.Despite these minor setbacks, Keizer completed the Megamarathon and broke the record with a time of 10 days, 20 hours, and 26 minutes.