The Endurance 50 website reports that Dean Karnazes has completed his 25th marathon, in his quest to run 50 marathons in 50 days in 50 states. Dean’s halfway to his goal now, and barring injury or something odd happening, he’ll likely complete the task. Today’s marathon was in Baton Rouge, LA, and Dean completed it in 4 hours, 12 minutes, and 20 seconds. Next up is Huntsville, AL. You can read more from Dean himself in his daily blog and find more coverage of the event at Runners World.