Pass Without Trace

Transmutation
Level: Assassin 1, Druid 1, Ranger 1, Justice 1
Components: V, S, DF
Casting time: 1 standard action
Range: Touch
Targets: One creature/level touched
Duration: 1 hour/level (D)
Saving Throw: Will negates (harmless)
Spell Resistance: Yes (harmless)

The subject or subjects can move through any type of terrain and leave neither footprints nor scent. Tracking the subjects is impossible by nonmagical means.