Mammoth is a Huge beast with unaligned alignment and Challenge Rating 6 in the 2024 SRD. This stat block includes AC 13, 126 hit points, speeds, traits, and actions.
Multiattack - The mammoth makes two Gore attacks.
Gore - Melee Attack Roll: +10, reach 10 ft. Hit: 18 (2d10 + 7) Piercing damage. If the target is a Huge or smaller creature and the mammoth moved 20+ feet straight toward it immediately before the hit, the target has the Prone condition.