This 4WD Trail Rating system is adapted from the scale used by some writers of guide books, with consideration for local conditions. These levels build on previous ones. As with any scale there is lots of room for interpretation.
The other consideration is of course trust in experienced spotters, which is more difficult to measure. Our event will strive to have experienced spotters on each run.
Cascadia Expodition would like to thank to volunteer Stuart Miller on this rating guide and organizing our local event trails.