| Terrain
| Modifier
|
| Soft or muddy ground
| +4
|
| Thick brush, vines, or reeds
| +3
|
| Occasional signs of passage, dust
| +2
|
| Normal ground, wood floor
| 0
|
| Rocky ground or shallow water
| -10
|
| Every two creatures in the group
| +1
|
| Every 12 hours since trail was made
| -1
|
| Every hour of rain, snow, or sleet
| -5
|
| Poor lighting (moon or starlight)
| -6
|
| Tracked party attempts to hide trail
| -5
|