Up to 700 people are expected to sign up for the challenge which this year is being made even tougher and muddier.
The event, which raises money for the NSPCC, takes place on a five-mile course near JCB’s headquarters in Rocester on Saturday 29 June 2013.
Among the features of the redesigned course is a 100ft-long underground tunnel, just under 10ft-high, filled with obstacles. Elsewhere cargo nets, rope swings, slides, monkey bars and jumps will further test the mud runners.
Around 500 people took part last year, raising £30,624 to help JCB hit its target of donating £1m to the NSPCC.
JCB worldwide marketing director Matt McClurg said: “This year's Mud Run promises to be even muddier, tougher and more testing than the inaugural event. It’s for a fantastic cause and we’re confident it’ll be even bigger and better than last time.”
Mud runners must be 16 or over and will be bussed to the course where clothes and bag storage as well as washing facilities, will be available. Spectators are welcome on the day too with activities including a mini mud run for children. Hot food and drinks will be available all day. Entry fees before 31 May are £45 for individuals and £160 for a team of four. From 1 June, it is £55 for an individual and £200 for a team. Entrants have to register in advance at www.thejcbmudrun.co.uk. The closing date is Friday 28 June.