Taken from the official Harry Potter Wiki site:
The Quintaped, also known as the Hairy MacBoon, is a magical dangerous beast with five legs, each ending in a clubfoot, and is covered with thick, red-brown hair.
The five club footed legs of the Quintaped are used to represent the number five in the runic alphabet.
You're looking for a small lock-and-lock container deep in Colt State Park. See additional waypoints for the most convenient trailhead and a trail that splits off the main, winding one that will lead to the cache. The cache is ONLY accessible from Colt State Park, so do not park on the nearby, private road. Please rehide the cache well and again, make sure everything is put back correctly. Thanks, and hope you enjoy.
In addition, a BIG thank you to RIclimber for providing the beautiful stamps for this series!