8,153
edits
Changes
From Fellrnr.com, Running tips
→Terrain
|Classification||Grade||Gain and loss
|-
|Flat|| <1% || Elevation gain + loss <53'/mile(10m/Km)
|-
|Light Hills|| 1-2% || Elevation gain + loss <106'/mile(20m/Km)
|-
|Moderate Hills|| 2-3% || Elevation gain + loss <159'/mile(30m/Km)
|-
|Heavy Hills|| 3-4% || Elevation gain + loss <212'/mile(40m/Km)
|-
|Mountains|| 4+% || Elevation gain + loss >212'/mile(50m/Km)
|-
|}
