From Pathfinder #176: Lost Mammoth Valley, which isn't enabled.

Elk

CREATURE 1

Powerful and swift land mammals, elk range through the plains, hills, and forests of the wilderness.

Their size, strength, and antlers (for the males) enable common elk to contend with most of their environment's dangers, though herds generally favor flight over combat. Most elk stand between 3 and 5 feet tall and weigh between 350 and 550 pounds, with females slighter than the males.

Perception +7; low-light vision, scent (imprecise) 30 feet

Skills Athletics +7, Survival +5

Str +4, Dex +2, Con +4, Int -4, Wis +2, Cha +0

AC 16; Fort +9, Ref +7, Will +5

HP 20

Buck

DC 17 Reflex

Most monsters that serve as mounts can attempt to buck off unwanted or annoying riders, but most mounts will not use this reaction against a trusted creature unless the mounts are spooked or mistreated.

Trigger A creature Mounts or uses the Command an Animal action while riding the monster.

Effect The triggering creature must succeed at a Reflex saving throw against the listed DC or fall off the creature and land Prone. If the save is a critical failure, the triggering creature also takes 1d6 bludgeoning damage in addition to the normal damage for the fall.

Speed 40 feet

Melee Antlers +9, Damage 1d6+4 piercing

Melee Hoof +9, Damage 1d4+4 bludgeoning

Startled Charge

Requirements It's the first round of combat

Effect The elk Strides twice and makes a hoof Strike at the end of either Stride. If the Strike hits, the elk deals an additional 1d4 piercing damage.

Pathfinder #176: Lost Mammoth ValleyOGL