Details
Course marking starts the week before the race. It entails flagging sections of the course so participants stay on course and know which turns to take. Previous course experience or knowledge of the trails is definitely helpful for course marking. A typical day of trail marking takes between 6-8 hours so you should be prepared for a full day in the woods with provisions such as nutrition and hydration. Marking usually requires some shuttling coordination, so even if you are just available to help provide a shuttle, it would be EXTREMELY useful.
Location
Specific marking meeting locations for each day will be announced a couple of weeks before course marking begins.