It's a Bison! In a Tree! In the Woods!
Or is it...???
A Newark Watershed hiking permit is required which you can get at the office on Echo Lake Road. https://newark.seamlessdocs.com/f/RecPermitNN
The trailhead is located between parking and the bridge just a few steps away. Follow the Teal/White blazed trail. If you solve GoodSamNurse's puzzle cache, it won't be very far out of your way after finding this one.
The cache is within 80' of the trail. The terrain seems to disturb the signal somewhat, but these coordinates should get you within 20'. The trail is well marked and mostly easy with a few logs to step over along the way with a bit of an uphill stretch approaching GZ.
Once you locate the container, take a moment to see how it is fastened. It will help make replacing it a little easier. Do the same before opening the container.
Have fun!
Congratulations to Harry Dolphin for being FTF!