The Endurance Course is a 2.5 mile obstacle course through the beautiful woods of Quantico. And passing it in a time limit is a mandatory requirement for completing OCS. Check out this superb run-through of the OCS Obstacle Course and Endurance Course by our good friend and fellow Marine Tyler: Here’s how it works: First, candidates run the Obstacle Course (O-Course) in boots and utes … Continue reading The Endurance Course: What You Need to Know