Participants are preparing for the Denis Rankin Round, an event set to take place this Saturday.
Runners must finish the course in no more than 24 hours.
This challenge is described as one of the ultimate mountain running tests available in Northern Ireland.
Previous involvement with the Hill and Dales series helped spark an interest in the sport among some competitors.
Organisers have reviewed various routes and challenges to ensure the event meets its standards.
The competition invites ordinary athletes to attempt what many consider an extraordinary feat.
No official decision has been made regarding future changes or expansions to the route.
The event remains scheduled for Saturday as planned.
Details on registration and start times are expected to be released closer to the date.