Terrain Scales | ||
Level | Tilt. | Surface |
| 1 | Flat or nearly flat | Paved or smooth surface |
| 2 | Rolling, total climb up to 50 feet per mile (2500 feet in 50 miles) | Mostly groomed trail or dirt roads |
| 3 | Hilly, total climb between 50 and 150 feet per mile (2500-7500 feet in 50 miles) | Trail or dirt road with some rocks |
| 4 | Very hilly, total climb between 150-250 feet per mile (7500-12,500 in 50 miles) | Trail or dirt road with substantial rocks, roots and/or ruts |
| 5 | Mountainous, total climb more than 250 feet per mile | Very rough trail |