n huge animal dinosaur 

Perception +13; low-light vision, scent (imprecise) 30 feet

Skills Athletics +12, Stealth +10

Str +6 Dex +2 Con +3 Int -4 Wis +1 Cha +0

AC  21; Fort +12, Ref +10, Will +11

HP 60

Speed 30 feet

Sprint [>>] Frequency once per minute; Effect The hadrosaurid Strides twice. It has a +20-foot circumstance bonus to its Speed during these Strides.

Trample [>>>] Large or smaller, foot, DC 21

Bestiary 2, page 82.