n huge animal 

Perception +17; low-light vision, scent (imprecise) 30 feet

Skills Athletics +21, Survival +17

Str +8 Dex +0 Con +5 Int -4 Wis +2 Cha -2

AC  26; Fort +20, Ref +13, Will +17

HP 175

Speed 45 feet

Melee [>] tusk +21 (reach 15 feet), Damage 3d8+12 piercing

Melee [>] trunk +21 (reach 15 feet), Effect grabbing trunk

Melee [>] foot +21 (reach 10 feet), Damage 2d10+12 bludgeoning

Dual Tusks [>] The mastodon makes two tusk Strikes, each against a different creature. This counts as one attack for the mastodon's multiple attack penalty, and the penalty doesn't increase until after both attacks.

Grabbing Trunk A Medium or smaller creature hit by the mastodon's trunk is grabbed. If the mastodon moves, it can bring the grabbed creature along with it.

Trample [>>>] Large or smaller, foot, DC 27

Bestiary 2, page 116.