Cut offs

Seems there are cut offs that you must make during the race or face elimination ... here is a quote from the registration site "Very challenging race. Course has been determined. 24 hours to finish with cut offs. The cut offs are reasonably generous but you must make them or you are eliminated from the race. Expect to cry, scream,
barbed wire, wood chopping, mud, water, ponds, etc. $2000 in prize money. Remember - 24 hours to finish the 10 mile course"