Bloodhound

Masters of the Wild: A Guidebook to Barbarians, Druids, and Rangers (MW)Supplementals (3.0)
School
Divination
Casting Time
1 standard action
Components
V, S
Range
Personal
Target
The caster
Duration
1 hour/level
Saving Throw
None (harmless)
Spell Resistance
No (harmless)

Related

If you fail a Wilderness Lore check to track a creature while this spell functions, you can immediately attempt another roll against the same DC to establish the trail.
It the reroll fails, you must search for the trail for 30 minutes (if outdoors) or 5 minutes (if indoors) before trying again.