How hard is it to reach the check points

[benedict]

Hi.

 I was wondering for those who have done it before, how hard is it to reach the check points in time.

   I am doing training but when the terrain gets difficult i slow to about 4-5km/h
      Is this enough

 Ben

[Simon]

You'll have heaps of time. Last year was my first TNF100, and by the end I was barely maintaining 3-4km, and got in well before the cutoff. Did not get in under 20hrs though!