Competitors can enter the 3km, 5km or 10km courses as an individual.
If that proves a little daunting for first-timers, there is also the "Mud Mate Teams" challenge option available, a new addition for 2015.
Teams of four, of which at least two must be females, will make their way around the 5km route, clearing obstacles and helping each other to navigate. "The Sport Whanganui team are hoping to attract a number of workplace teams to take up this option and are challenging groups to consider the event, and the build-up to it, as an opportunity for workplace team building," said the press release.
For all those taking part, the courses will start with a lengthy climb to reach the highest point on the farm, before coming back down through the native bush, muddy yard, dams, streams, pine trees and over 20m worth of water slides.
"The final challenge will be the jet sprint track itself and a prime viewing spot for spectators ..."
Sport Whanganui will also partner with the Wanganui Bootcamp group to run a series of early morning group training sessions at Cooks Gardens, free of charge, for seven weeks in September.
-The Mud Muster is open to adults, and students from Year 9 and over. Entry prices and event information can be found at www.mudmuster.co.nz