What length spikes are usually used in a high school cross country race?

Question

You can probably use longer spikes in xc than in track right?

Answer 1

Sorry we only work in millimetres now.

6mm tracks spikes

I have used anything from 9mm to 15mm with javelin spikes in really muddy conditions.

The selection of spike size is really dependant on the ground conditions. Generally 9 or 12mm should suffice.  

Answer 2

Don't use spikes at all if its a course with a lot of concrete/ hard packed gravel, just wear blanks in the spike holes, otherwise, whatever the shoe comes with should be fine.  

Answer 3

3/4 inch is the longest or you get dq