Marine Obstacle Course Crushed by OCS Instructor


The Marine Obstacle Course, also known as the Tarzan Course or O-Course, is one of the first challenges new recruits face.

It’s a challenging course, especially when faced with sleep deprivation and physical exhaustion. The O-course challenges strength, endurance, and mental toughness.

The Marine Obstacle Course

It’s designed with obstacles every ten yards.

They’re varied by height and get increasingly more difficult as the course progresses.

You start by jumping over a horizontally mounted log about three feet off the deck. Deck is Marine-speak for the ground, by the way.

Then there’s a high bar obstacle. Then another low log. It alternates like that: high obstacle, then a low obstacle.

There are three Marines in the video, all of them instructors at the Officer Candidate School in Quantico, Virgina. They train the men and women who will lead Marines in training, on deployment, and in battle.

The next Commandant of the Marine Corps will go through OCS.

These instructors are some of the fittest Marines around, so who better to show how to fly through the Marine Obstacle Course with ease?

Watch how the first instructor flies past his peers by utilizing the “recon roll” over the first high bar obstacle.

We’ve got a more in depth description of the Marine Corps Obstacle Course but thought it would be a great idea to share this video. It’s also at the bottom of that page so you can access it there.

I hope you enjoy the video.

Check out the rest of the site if you’re planning on becoming a Marine or heading to boot camp soon.

There’s a complete description of the recruit training cycle for 2019.

And information on what to expect when you get to marine boot camp, and answers to common questions like:

There’s also a complete guide to training for boot camp, including fitness, nutrition, a basic running plan, and more. Click the link in the sidebar to learn more.

Semper Fi!


  1. Send me an email address and I’ll reply with a picture taken by platoon mate Don Brand during the inter platoon competition, 47th OCC, December 1967. I was the O Course team leader and the picture is me negotiating the high log at the end of the traverse. Compare it to the Marine in the video at the 0:17 mark and you’ll understand why he ran the course in 1:11 and I ran it in 0:26. It was my answer to the challenge presented on week one by Sgt. JB White that he’d buy a beer for anyone who could beat him. The beer tasted good. He’s the one responsible for my motivation and making me into the man that I am. JB died fourteen months later in Nam. Rest in peace, Marine. I’ll never forget you.


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