Rating Symbol
|
Brief
Definition
|
Surface
|
Grade
|
Obstacles/
Steps
|

easiest |
Paved Accessible Trail |
Paved or hard and smooth |
 |
None |
|

easy
|
Mostly smooth and wide |
Dirt with occasional unevenness |
|
2" or less, rocks and ruts |
|

moderate
|
Mostly smooth, variable width |
Dirt with occasional unevenness |
 |
<8" rocks and ruts, loose material |

moderate difficult |
Mostly uneven surfaces |
Dirt and rock |
|
<12" rocks and ruts, loose material |

difficult |
Long rocky segments with possible drops and exposure |
Dirt and loose rock with continual unevenness |
 |
12" or taller, loose rocks, exposure to drops |

extremely difficult |
Long rocky segments with possible drops and exposure |
Dirt and loose rock with continual unevenness |
|
12" or taller, loose rocks, exposure to drops, and excessive heat >90F |