Old Skool Mud Run @ Claydon Estate, Buckingham, Buckinghamshire, United Kingdom on 02 April 2016


Cast your mind back to the halcyon days of open fields, muddy ditches, ill-fitting shorts and steam rising from your singlet: This is Cross Country Running as it always was, but not quite as you remember it. Because this is a classic off-road mud run re-invented especially for the 21st century, carefully crafted from the […]

Runner Water Wipeout @ National Watersports Centre, Nottingham, Nottinghamshire, United Kingdom on 09 July 2016

Wetter & Better Obstacles at Water Wipeout

Water Wipeout is the ultimate obstacle race and mud run. This awesome challenge will include: Water Slides, Tightropes, Tunnels, Hurdles, Giant Walls, Cargo Nets, Spider’s Webs, Balance Beams, Mud, Water and the Assault Course, are you tough enough, are you up for it, are you ready for the race of your life?

There are 5k […]

Xrunner Winter Warrior @ Donington Race Track, Castle Donington, Midlands, United Kingdom on 06 February 2016

Tough enough?

This awesome obstacle race will be held at a world class venue, Donington Park Race Track. This is a fantastic facility that allows us to operate in all weather conditions so no shying away from the snow and ice for Xrunners. The indoor event HQ and post race hospitality will be in the comfort and […]

Xrunner Wild Mud Run @ Osmaston Manor, Ashbourne, Derbyshire, United Kingdom on 16 April 2016

Biggest Slide EVER!

Wild Mud Run is back in 2016 and our mission is to make this event even better than before. The swampy terrain, undulating hills and magnificent wooded areas mean we can utilise what nature has kindly given us to make this the muddiest race in the world. The magnificent lakes in the grounds play an […]

Bath Skyline 10 Km Series @ University of Bath, Bath, Avon, United Kingdom on 15 November 2015

Collect the Interlocking Medals!



LIVE TIMING and Custom Medal!

There are 4 events in this winter series 10km series. Enter all 4 for the price of 3 and collect the interlocking medals by completing any 3 of the […]

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 […]

Rat Race Mighty Deerstalker @ Traquair House, Innerleithen, Scotland, United Kingdom on 12 March 2016


Legend tells of a cult running event deep in the Scottish Borders. This is probably the hardest off-road-Tweed-clad-pipe-lit-plus-four-and-headtorch-wearing run that exists. We send you across rivers, through forests and over a mountain or 2 in the pitch dark of a chilly March night.

Rat Race Dirty Weekend @ Bughley House, Stamford, London, United Kingdom on 07 May 2016


Rat Race Dirty Weekend brings monster builds, a phenomenal afterpary and the brutal 20 mile course back to Burghley House in 2016. The World’s Biggest OCR offers up 20 miles jampacked with 200 obstacles designed to smash your limits and give you the ultimate obstacle racing weekend away with your mates.

NUCLEAR BLACKOUT @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 19 September 2015


Blackout is a 5km multi-lap obstacle loaded night race. It will launch you out of your comfort zone, llead you into unknown territories, testing all of your senses to the maximum as you negotiate endless & overwhelming obstacles by the light of a headtorch. This course is designed to challenge the fears of claustrophobia, darkness […]

NUCLEAR BLAST @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 19 September 2015


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 with over 30 obstacles designed to test strength, power, speed, endurance, agility, stamina & balance. Race […]

NUCLEAR FALLOUT @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 14 November 2015


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 are muddier […]

Nuclear Oblivion Ultra Mudathon @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 16 May 2015


Oblivion is a 26 mile/42km ultra mudathon designed to challenge the fastest and fittest of obstacle racers. Don’t underestimate its brutality as you will have 7.5 hours to complete the distance whilst tackling approximately 175 mixed obstacles. This event requires hardcore training as is the ultimate test of physical and mental endurance and strength. This […]

NUCLEAR RUSH @ Kelvedon Hatch Secret Nuclear Bunker, Brentwood, Essex, United Kingdom on 16 May 2014


Nuclear delivers award winning ultra gritty, muddy, obstacle loaded 6km & 12km events. Courses are designed & built to challenge all abilities of fitness with a mix of natural & high quality man-made obtacles, over varied terrain. Woods, lakes, bogs, ditches, hills, clay pits, zip-lines, DeathSlide, Gorilla Bars, log carries will push to your limits […]

Xrunner Winter Warrior @ Donington Park, Castle Donington, Derbyshire, United Kingdom on 31 January 2015


Winter Warrior obstacles will include, Cresta Run, Avalanche, Human Cannon Ball, Fire Starter, Vertigo, Monkey Bars, Mud, Tunnels, Giant Walls, Cargo Nets, Balance Beams, Hurdles, Jacobs Ladders, Tightropes and the assault course, with over 30 challenging obstacles per lap it promises to be the ultimate muddy good run.

This awesome new obstacle race will be […]

Mud Runner: Classic @ Eastnor Castle, Eastnor, Herefordshire, United Kingdom on 19 October 2014


7ish arduous country miles around the Eastnor Estate using the same tracks on which Land Rovers have been tested and developed.

Mud Runner is over a variety of terrain and conditions from rolling grassland (well a little bit anyway) to mud, wet mud and sticky mud. The course includes hills, waterfilled pits, muddy banks and […]

Brutal10 Woolmer @ Woolmer, Greatham, Hampshire, United Kingdom on 18 October 2014


This event is an official Mudstacle scoring event.

A new car park and arena area to cope with the increasing numbers using all the good bits of previous years. This race has our slowest winning time each year, which might tell you something. All in all a tough start to the Winter Series.

Brutal10 Minley @ Minley Training land, Blackwater Valley, Hampshire, United Kingdom on 16 August 2014


We’re offering 5km, 10km and 20km distances. This event is always has a great relaxed summer atmosphere and the venue is great for easy access from the M4.

Night Rush Extreme Run @ Off Road Action Park, Wickford, Essex, United Kingdom on 22 November 2014


You’ll need a head torch and courage as this night time extreme 10k run takes you over undulating muddy tracks and obstacles to challenge the bravest of runners. New to extreme running? why not try our new 5k option? Join the Night Rush if you dare.

ARCHIVED RACE: Shapwick Bunny Hop @ Shapwick Village Hall (HQ), Shapwick, Somerset, United Kingdom on 21 April 2014


A 7.5 mile trail run through the fields and lanes of Shapwick and Shapwick Nature Reserve. Slightly undulating, with largely downhill first half and uphill second half. Very rural and can be very muddy so off-road trainers recommended. Views of Glastonbury Tor and Mendip Hills. Hearty brunch, hot drinks and cakes served at finish for […]

Nuclear Fallout @ Secret Nuclear Bunker, Kelvedon Hatch BRENTWOOD, Essex, United Kingdom on 02 November 2014


Nuclear Fallout is our beast…

The wetter, colder & muddier race; the one you need to train for – take it for granted and it will bite you. It’s our last event of the year so we throw everything at it – not only is it longer at an 8km or 16km distance, but we […]

NUCLEAR BLACKOUT @ Secret Nuclear Bunker, Kelvedon Hatch BRENTWOOD, Essex, United Kingdom on 20 September 2014


Test your senses and agility on our 5km multi-lap cross-country Obstacle Night Race. You have 2 hours to complete as many laps as you can over & through 20 obstacles over open fields, woodland, lakes, tracks, ditches, river crossings and hills. For the first time, 2014 will see part of the course run through the […]

ARCHIVED RACE: SEAL Extreme Challenge @ Outdoors in the Smokies, Cosby, TN, United States on 05 April 2014


Based on runner feedback, this is “the toughest 5k’ish adventure race in the Southeast”. This is a difficult course designed to challenge participants both physically and mentally. Runners continually rank the difficulty of this event FAR beyond other popular adventure races. This is not smoke and mirrors…this is no hype… this is the real deal. […]

ARCHIVED RACE: Xtreme Beach @ North Fambridge Yacht Haven, North Fambridge, Essex, United Kingdom on 06 April 2014


Xtreme Beach – An OCR by Xtreme Running with a difference that is designed by our team of experienced runners to use what no others do – the SEA, BEACH and MARSH LAND.

That is not all, you will be tested on plenty of other man made obstacles for example your upper strength will be […]

ARCHIVED RACE: The General @ The Matterley Estate, Winchester, Hants, United Kingdom on 18 May 2014


Sunday 18th May 2014 sees The General return for his 3rd Tour. In 1944 General Eisenhower addressed the troops ahead of the D-Day landings… In the 1990’s thousands of ravers fought off insomnia by dancing through the night…

You get to make history by joining your like minded ‘Band of Brothers/Sisters’ by tackling the unique […]

ARCHIVED RACE: NUCLEAR RUSH @ The Secret Nuclear Bunker, Kelvedon Hatch, Brentwood, Essex, United Kingdom on 11 May 2014


Nuclear Rush is a chip timed gritty cross-country obstacle race on muddy Essex farmland, heavily loaded with man-made and natural obstacles. There are two race distances available to run on the day: 12km & 6km.

What to expect: Over 50 obstacles including classics – tyre pits, walls, ramps, cargo crawls/nets, ponds, lakes, water wades, slides, […]