If you’re someone who’s interested in extreme fitness, it’ll do you good to know about the best extreme fitness events out there.Such events are perfect for putting individuals through obstacles that test their physical ability as well as overall focus.Talking about the 10 best extreme fitness events for 2018, it can be argued that the one’s the UK holds are at the very top.Let’s go over them! Vertical RushLocation: Tower 42, London Type of Event: Tower running Skill Level: BeginnerIndividually or even as part of a team you need to attempt reaching the top of the Tower 42 located in Central London. Participants need to cross 932 steps to get to the top in the fastest time in order to raise funds for homeless charity, Shelter. Rat Race Mighty Deer StalkerLocation: Innerleithen, Scotland Type of Event: Night time obstacle race Skill Level: ExpertBeing UK's biggest night race, it takes place at Innerleithen, Scotland with participants attempting to conquer different obstacles including rivers, forests, and mountains. Taking place in the dead of night, this race spans over 14-kilometers, and beer and bacon rolls await those who finish the race. The Royal British Legion Major NorthLocation: Bramham Park, Leeds Type of Event: Obstacle Course Skill Level: BeginnerAge is just a number, and for it to continue being so, fitness is important. One can either walk, jog or run the 5-kilometer or 10-kilometer course, overcoming obstacles packed with mud. Questars Adventure RaceLocation: Fordingbridge, Hampshire Type of Event: Triathlon Skill Level: Beginner to ExpertOn the outskirts of the New Forest National Park, there is the Questars Adventure Race which happens to be one of the toughest triathlons present the south of England. Explore the beauty as you run, walk and kayak individually or as part of a team. The fastest person or team wins. The Wild Mud RunLocation: Osmaston Manor, Derbyshire Type of Event: Extreme Obstacle Race Skill Level: IntermediateWith around 30 different obstacles to overcome, the Wild Mud Run is full of challenges ranging from wild rivers to climbs to jumps and other obstacles to challenge your fitness and balance. Manchester MarathonLocation: Old Trafford, Manchester Type of Event: Marathon Skill Level: Beginner to ExpertThe Manchester Marathon happens to be one of the first full-distance events of the year. Starting out in Old Trafford runners go to football and cricket stadiums, Beetham Tower, City Centre and the surrounding towns. Tough Mudder London WestLocation: Culden Faw Estate, Henley-on-Thames Type of Event: Obstacle Course Skill Level: Intermediate to ExpertThis race comprises of some of the toughest challenges that participants have to overcome. This includes going over hills and mud to also put your mental abilities to the test. The Isle of Wight ChallengeLocation: Chale, Isle of Wight Type of Event: Endurance Challenge Skill Level: Beginner to ExpertWith a distance of 106-kilometers, walk, jog or run to tackle your chosen distance in a time of 2 days. Great Birmingham 10KLocation: Birmingham City Centre Type of Event: 10K Run Skill Level: BeginnerA 10-kilometer run through the streets of central Birmingham with cheers and lots of music to keep you going. Run for fun or as a marathon, your choice. Virgin Money London MarathonLocation: Greenwich Park, London Type of Event: Marathon Skill Level: Intermediate to ExpertThis particular event is one of the most difficult endurance events to take place in the UK. Years, months and days of training comes down to this specific day of the Marathon. Runners and other participants have to take on 26.2 miles around the streets of the capital. You can either run it as a challenge or as a fundraiser for your charity.