Frontline OCR obstacle races, mud run, and OCR information, distance, cost, dates, calendar, discounts, obstacles, reviews, and more

Use discount code MRG2020 for 25% off your Frontline OCR registration!!!!

Frontline OCR is a 5 mile race with 25+ obstacles inspired by the military and first responders.

Upcoming Frontline OCR Events

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  • Race discount More info
  • October 31, 2020
    Byron Illinois Frontline OCR The 5th Wave 2020
    Byron Motosports Park, Byron, IL, United States
    Save 25% on your Frontline OCR with code MRG2020 Learn More

Browse our calendar of previous mud runs, mud races & obstacle races for Frontline OCR

Frontline OCR News & Featured Reviews

Frontline OCR Reviews from the Community

Average rating: 5 / 5 from 19 reviews.

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May 24, 2018 by Dustin firkin

Event was jam packed with obstacles that will test your grit, festival area was very nicely set up with amazing sponsors, the finsher beers were amazing as well. I would recomend this race to anyone that wants a hard challenge.

Amazing, gratifying event

May 24, 2018 by Kate

As a first responder, this race was amazing. I chose to run this race for the message and meaning. Ended up loving this race for the difficulty and the fun. Ed Leon and his staff did an amazing job creating a fun course with challenging obstacles. Running the Hero Wave, I saw a ton of teamwork - exactly what this event is about. Wave 3 in October will be another exciting journey into the Frontline!

Awesome Event

May 24, 2018 by Adam C

This was the most challenging OCR I have completed and it was SO FUN.

The struggle is real!

May 23, 2018 by Pam Grande

This...was...the best!!! The obstacles were unique, covering me in the biggest bruise collection I have ever come home with. But, it was downright fun even though it was one of the hardest races Ive ever done! There was,tough terrain, even tougher obstacles. The course kept your mind working as hard as your body! I was inspired by the heroes, elite and endurance athletes who raced before me. I mean, really? Racing with a weight vest on??
Very well run event with a great venue and festival! Definitely coming back in October for another go at this race!

Exceeded my expectations

May 23, 2018 by Kris Wolff

Frontline OCR completely exceeded my expectations. From the elevation, terrain and obstacles, it was one of the most challenging OCR events I have ever done. Hats off to Frontline, the build team and all the volunteers who contributed in putting on such a great event and congrats to ALL the competitors. If you want a true challenge, Frontline OCR will give you everything you can handle.


Sep 14, 2017 by Rob Simon

Hard to believe this was their inaugural event because it was very well organized start to finish. Best part was having different and innovative obstacles. For those of us who run races regularly we want something different and this race delivered. Other reviewers note being sore after this race;, and I had the same experience, which is not the case after a typical Spartan race. Definitely coming back next year.


Aug 29, 2017 by Franco Spartan

Thanks Ed Leon and all the staff of Frontline Ocr to make Frontline mud race. It was awesome I was filling like a kid getting muddy and like a warrior wen a cross the finish line. The obstacles were a real challenge, I can not wait for the next race!!!! It was AWESOME RACE!!!!!

Frontline OCR

Aug 29, 2017 by Heidi Williams

From the moment I put on that Weighted Vest I knew I was in for the Race of my life !!! Frontline OCR far exceeded any Race I have competed in ... Challenging , exciting, great trails , different obstacles, did I say Challenging :) Great course markings on the trails is a must and that was done to perfection { Thank you Lee Stowell } !!!! The Volunteers and Staff were some of the best ... If I could change one thing it would be , {seeing I won over all elite female } The trophy and money go to the winner of the race and the other trophy goes to the second race The Blitzkrieg Round ;, this only seems fair to all participating in one Kick ass race ... Will I do it again ??? Absolutely !!! Highly recommend this race to the die hard athlete :) See you all soon :)

Inaugural FrontlineOCR

Aug 29, 2017 by Derrick Neil

Participated in the inaugural FrontlineOCR, and it was everything they said it would be. I thought, and I spoke to quite a few in attendance, that it was run and organized extremely well. There were a couple of very minor issues, but again, it's an inaugural race, so everything don't be perfect. The course itself was marked extremely well, the obstacles were challenging, and the terrain was technical. Not a lot of waiting for obstacles, which was nice. And the volunteers did an amazing job. It was an honor and a privilege being able to run this, and I can honestly say it was the toughest race I've run this year. Woke up sore from a race for the first time all year. I already can't wait to run it next year!

Aug 29, 2017 by Kyle Birdsong

In the current era of ocr, big name races are getting weak with their obstacles and course designs. Frontline ocr came out swinging and didn't pull any punches. This was easily the most challenging race I've done thus far.

The Ultimate Mud Run, Obstacle Race and Adventure Race Guide , USA 5.0 5.0 16 16 Event was jam packed with obstacles that will test your grit, festival area was very nicely set up with amazing sponsors, the finsher beers were amazing as well. I would recomend t