Organisers of this year's Mud Runner Lite have confirmed the event has been cancelled.
It had been due to take place at Eastnor Castle near Ledbury next month.
In a statement, event organisers said: "We were excited about bringing back this much loved event but unfortunately the sales have been slower than we expected and after the year we have had we simply cannot take the risk financially."
"Thank you for all the enthusiasm and love and especially to all of those who signed up. We have enjoyed your memories and all your comments."
"We will be giving everyone who has registered a full refund over the next week."
Work on replacing ageing Victorian water pipe in Monmouth to continue
Designer appointed for redevelopment of Hereford Museum and Art Gallery
Charities calling for clarity on when new base for people with disabilities will be available
Hereford car showroom plan for new SUV brands
‘Improved’ plan to replace turkey sheds with houses near Leominster
Emergency services respond to explosion at BAE Systems Monmouthshire site
Legal challenge launched to prevent demolition of Three Counties Hotel
Number of empty homes in Monmouthshire reduces since council tax premium
