Malaysian sporting event Viper Challenge, said to be Asia's biggest and most grueling obstacle challenge, is taking place at Sepang International Circuit on August 17 and 18.

The two-day event has already seen almost 8,000 participants, with about 1,000 registered coming from Singapore. Those interested have up to August 8 to sign up.

Organized by Original Bootcamp Sdn Bhd, this 20km challenge counts more than 20 obstacles with elements of fire, ice and mud. Take note, it's not a race—your ultimate goal is to complete the course in a matter of hours. Sign up as a team (there's no limit on number of members) or as an individual, though solo participants should expect cooperation and teamwork from other lone rangers to get across the finish line.