Lightfeet

 
Prerequisite(s): Elf, Dex 13+, Balance 2+ ranks, Move silently 2+ ranks
 
Benefit: You can walk without leaving behind any but the most subtle marks. The survival DC to track you increases by 5 (or 10 if you move at ½ speed and try to cover your trail). You ignore all penalties to your move silently from noisy terrain.
 
Source: Races of the Wild