There are also challenging man-made obstacles contestants have to be prepared to climb over, under or go through.
The staff know - they did a working bee last week to put in those obstacles while also finalising the course.
"The course is designed for youth and adults, and will provide a great opportunity for fun, laughter, team bonding, confidence building, mental and physical achievement."
Everyone will have their run time recorded via an electronic timing system and the top three competitors in each category will be announced.
To get to the course, a bus will be available for interested parties - departing from Wanganui central and returning for a fare of $10.
More details about the Mud Muster, including a preview trailer and sneak-preview photos, can be found on the Sport Wanganui website (sportwanganui.co.nz), or on the Sport Wanganui Facebook page.
It is open to male and female adults, and secondary students aged 12 years and older.
Register online at www.sportsground.co.nz/mudmuster, before the deadline on Friday.