Broncos Stadium Challenge @ Sports Authority Field at Mile High, Denver, CO, United States on 11 June 2016

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24 Hour Fitness has teamed up with Denver Broncos to create the ultimate day of good vibes and great beats. Presenting the Denver Broncos Stadium Challenge featuring a Music 5K Run, 24 Life Obstacle Course and Music Festival. Join us in Broncos Country, come Run, Tackle, Party and #RockWith24. end end

The Respond Ultimate Mud Challenge @ Assault Course Events, St Albans, Hertfordshire, United Kingdom on 25 June 2016

Tackle the Respond Ultimate Mud Challenge

Get Muddy for Money! This 5 mile Mud Challenge takes place on a cross country course featuring 40 large obstacles including container climbs, 10m tunnel slides, invert walls, cargo net, mud crawls and obstacles that involve participants being full immersed in water – and it is suitable for people of all levels of fitness aged […]

Trailtroopers Castle Dangerous OCR @ Douglas & Angus Estate, Douglas, South Lanarkshire, United Kingdom on 13 August 2016

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Obstacle Race with lots of natural and man made obstacles over a 12k for adults with a 3k family/kids option. end end

Pain & Suffering 10m Summer Obstacle Race @ Rockingham Castle Estate, Rockingham, Leicestershire, United Kingdom on 26 June 2016

Obstavle race UK Midlands

2016’s toughest race! This is Pain & Suffering, one of the hardest obstacle races Great Britain has to offer. We have taken inspiration from fell running, cross country and obstacle racing to create the ultimate race challenge.

Set in the harsh terrain of the grounds of Rockingham Castle this 10 mile plus obstacle race is […]

The Suffering 10km Summer Obstacle Race @ Rockingham Castle Estate, Rockingham, Leicestershire, United Kingdom on 25 October 2016

Obstacle race UK

The Suffering Obstacle Race is waiting, are you ready?

Set in the rough and rugged Great Park of Rockingham Castle this 10k obstacle race is a challenge even for the most experienced OCR runner. It has been meticulously crafted by The Head Reapers to challenge you at every twist and turn and includes over 25 […]

The Suffering 5km Summer Mud Run @ Rockingham Castle Estate, Rockingham, Leicestershire, United Kingdom on 25 June 2016

Obstacle race UK

It’s our entry-level race but… Set in the idyllic grounds of Rockingham Castle this race has been crafted to challenge all that take part and includes over 15 awesome obstacles.

If you’re after mud, water and loads of fun this is the race for you. Running in teams or solo, the sense of camaraderie on […]

The Prime Four Beast Race – Banchory @ Knockburn Loch, Strachan, Aberdeenshire, United Kingdom on 24 September 2016

Can you tame the Beast?

BEAST yourself on an epic 10k obstacle race over rough terrain, dirt tracks and forest; take on mega obstacles; run solo or in a team; win brilliant prizes; do it for charity; be in ridiculous fancy dress … Do any of this and more at Scotland’s ‘beastliest’ obstacle race.

It all starts on the banks […]

Nuclear Fallout 12K @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 12 November 2016

Deathslide in the cold

Award Winning Nuclear Fallout is our beast…

The wetter, colder and muddier race; the one you need to train for – take it for granted and it’ll bite you. It’s our last event of the year, so we throw everything at it – every obstacle Nuclear has, is included and the 6km and 12km courses […]

London Rat Race @ ExCel Centre, London, United Kingdom on 13 August 2016

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Get ready to swim, wade, crawl, climb, jump, splash and run your way around our aquatic obstacle course. Brought to you by Rat Race, this is your chance to join 1,000s of #RatRacers at London’s ExCel centre for this wet ‘n’ wild 10km running course around Docklands, linking together many special water and shore based […]

NUCLEAR FALLOUT 6K @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 12 November 2016

Award Winning Obstacles

Nuclear Fallout is a 6K gritty obstacle race on muddy Essex farmland, heavily loaded with 70+ natural & unique, high quality, big man-made obstacles designed & built to challenge all fitness abilities. Winners of four awards & UKs best overall mud & obstacle races 2015; expect epic mud & big but achievable obstacles – Deathslide, […]

NUCLEAR RUSH @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 14 May 2016

Voted UK's BEST INDIVIDUAL OBSTACLE 2015

NUCLEAR RUSH WEEKEND – Saturday 14th & Sunday 15th May. Nuclear Rush is a chip-timed 6/12k gritty obstacle race on muddy Essex farmland, heavily loaded with 70+ natural & unique, high quality man-made obstacles designed & built to challenge all fitness abilities. Winners of four awards including UKs best overall mud & obstacle races 2015; […]

NUCLEAR BLAST @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 17 September 2016

Project M.U.D

Nuclear Blast is a 5km obstacle loaded multi-lap course over mixed, muddy terrain suitable for all levels of fitness. Fun, exhilarating and achievable, it’s the night-time Blackout course but in daylight! Excellent introductory experience for first time obstacle racers or seasoned racers wanting to push their limits. • Run as many 5km daytime laps as […]

NUCLEAR RUSH @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 14 May 2016

Voted UK's BEST INDIVIDUAL OBSTACLE 2015

NUCLEAR RUSH WEEKEND – Saturday 14th & Sunday 15th May. Nuclear Rush is a chip-timed 6/12k gritty obstacle race on muddy Essex farmland, heavily loaded with 70+ natural & unique, high quality man-made obstacles designed & built to challenge all fitness abilities. Winners of four awards including UKs best overall mud & obstacle races 2015; […]

NUCLEAR OBLIVION @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 15 May 2016

The Ultimate Endurance

4 Nuclear laps…can you #GoBeyond? WINNER OF THE TOUGHEST OCR IN THE UK 2015 Oblivion 2016 is 48km of endurance obstacle racing. It’s the 2015 Mudathon distance with an even BIGGER twist. Designed to challenge the fastest and fittest obstacle race athletes out there; it’s our most brutal & unforgiving event. There’s 9 hours to […]

NUCLEAR BLACKOUT @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 17 September 2016

Probably The Best Saturday Night Out In Essex

WINNERS OF BEST OVERALL MUD & OBSTACLE EVENTS 2014/15 Blackout is a 5km multi-lap obstacle loaded Night Race. This race will launch you out of your comfort zone. It ‘ll lead you in unknown territories, testing all of your senses to the maximum as you negotiate endless & overwhelming obstacles by the light of a […]

NUCLEAR ROOKIES @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 14 May 2016

Nuclear Rookies #lovemud

OBSTACLE RACING FOR CHILDREN – Saturday 14th & Sunday 15th MAY 2016 Nuclear Rookies are fun, pumped-up muddy obstacle courses for 4-14 year old kids of any fitness level. Rookies can test their skills on a specially designed fun 1.5/3km course filled with around 15 obstacles & guaranteed Nuclear M.U.D! Rookies will climb in & […]

The Muddy Mucker© @ Chiswell Green Lane, St Albans, Hertfordshire, United Kingdom on 10 April 2016

Get your teams together for the Muddy Mucker©

The Muddy Mucker© returns at the brand new location of Chiswell Green, St Albans!

Join us at 10am on Sunday 10 April 2016 and test your endurance in a 5 mile obstacle challenge. The event is open to anyone over the age of 16 (under 18s must have parental consent to take part).

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The Suffering V – Spring 2016 @ Rockingham Castle, Rockingham, Leicestershire, United Kingdom on 12 March 2016

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It’s our entry-level race but… Set in the idyllic grounds of Rockingham Castle this race has been crafted to challenge all that take part and includes over 15 awesome obstacles.

If you’re after mud, water and loads of fun this is the race for you. Running in teams or solo, the sense of camaraderie on […]

Spartan Race Sprint Edinburgh @ Spittal Farm, Ninemileburn, Midlothian, United Kingdom on 23 July 2016

Don't be afraid to fail. Be afraid not to try.

A Spartan is not your average race! While you are certainly familiar with everyday run-of-the-mill road races, the Spartan Race is like their adventurous, adrenaline-junkie friend who thrives on excitement. Not only will you be running, climbing, and crawling across some of the most gorgeous terrain the world has to offer, but you’ll also get […]

The Nuts Challenge @ Swires Farm, Henfold Lane, Dorking, Sussex, United Kingdom on 05 March 2016

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The Nuts Challenge is a 7-28k assault course UK adventure race in Surrey near London. Our next mud run is on 5th/ 6th March 2016, places fill up fast with limited availability.

You can run for charity or just for fun, the assault course is also available all year round and we run special obstacle […]

St Lukes Santa MUD Run – Nuclear Races @ Secret Nuclear Bunker, Kelvedon Hatch, Brentwood, United Kingdom on 14 November 2015

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St Lukes Hospice have partnered up with Nuclear Races to bring you the craziest twist of Christmas and mud since they added vanilla to coke!

6km course distance over ultra-gritty, properly muddy, obstacle-loaded farmland set in the heart of the Secret Bunker Estate.

Nuclear Races are well known for delivering award winning events with big, […]

Commando Series @ Hever Castle, Edenbridge, Kent, United Kingdom on 14 November 2015

Commando Series

Commando Series, a 6km obstacle challenge is an endurance test like no other. Coming to Hever Castle in Kent on Saturday 14th November for the first time ever, Commando Series gives all ages and abilities the opportunity to experience the mud, sweat and pain of real, modern day, commando training, taking on 15 gruelling obstacles […]

Epic Mud Run @ Midway Travel Plaza, Columbia, MO, United States on 15 August 2015

5K Epic Mud Run at 2:00 PM at Midway Travel Plaza in Columbia Missouri on Saturday, August 15, 2015 end end

Mississippi Mud Run @ St. Feriole Island Park, Prairie du Chien, WI, United States on 19 September 2015

Come join the fun at the Mississippi Mud Run!

This is our 5th year doing our home town home-brewed mud and obstacle course race. We don’t just run you around a corn field here. Our course loops around the edges of St. Feriole Island, our towns 240-acre city park on the Mississippi River. We make full use of the abundant riverbank mud, and natural […]

SPARTAN RACE – MANCHESTER SPRINT UK – 5+ K @ Heaton Park, Manchester, Lancashire, United Kingdom on 04 July 2015

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Reebok Spartan Race, voted Best Obstacle Race in 2014 by racers, is the world’s leading obstacle racing series and the first of its kind to have global rankings. Spartan Race integrates obstacles with the natural terrain to create the best racing experience possible. Each course is unique, so racers never compete on the same course […]