Keep Pace 
Feat 6ArchetypeSource Advanced Player's Guide pg. 163Archetype Bounty HunterPrerequisites Bounty Hunter DedicationTrigger Your prey is within reach and attempts to move away from you.
Your prey can't Escape. Stride up to your Speed, following the foe and keeping it in reach throughout its movement until it stops moving or you've moved your full Speed. You can use Keep Pace to
Burrow,
Climb,
Fly, or
Swim instead of Stride if you have the corresponding movement type.
Traits
Archetype: This feat belongs to an archetype.