You are looking for a plastic jar hidden just off one of the many mountain bike side trails - I accessed it via the Oaks Trail but there are other ways to get here.
In season this might be a good place to grab some blueberries!
This property is popular with mountain bikers, horseback riders, hikers, and dog walkers - all of which I saw while hiding these - so please be aware of your surroundings at all times. In addition to the marked trails, there are many smaller unmarked trails most of which twist and turn so don't plan on a straight line to anywhere. For more information on this property please visit: https://www.wilbraham-ma.gov/295/Altons-Way-Trailwalk