Holy cow, I’m reading the book Ultramarathon man and this guys’ incredible. Check it out - he has run 262 miles (10 marathons nonstop), swam across the San Francisco Bay, run a marathon to the South Pole, mountain-biked for 24-hours straight, surfed the gigantic breakers off Northern California and Maui, and run 146 miles across Death Valley in the middle of summer to the top of Mt. Whitney. On one occasion, Karnazes ran 100 miles all-night to the start of the Napa Valley Marathon, and then completed the marathon in 3:15.
Now this guys a T-man!