Northwest Arkansas welcomed endurance athletes from 13 countries for Expedition Ozark, part of the Adventure Race World Series, which began Monday and will lead teams on a 390-mi course through parts of Oklahoma, Missouri, and Arkansas from Apr 3-8.

• Extreme endurance: For five days, teams will run, bike, paddle, and repel through a series of checkpoints with nothing but a map and a compass to navigate. To hit the most checkpoints, the winning team will likely only get 4-5 hrs of sleep all week.
• Follow the trail: Teams can be tracked online, and the HUB Bike Lounge in Bentonville is hosting a watch party at 6:30p each night to gather and cheer on your favorite teams.

Follow along for Facebook coverage of Expedition Ozark HERE.