YOu are looking for an ammo box hidden in Linear Park. The starting coordinates will bring you to a playground where you will be able to see the first glint. You will need a flashlight with a strong beam and extra batteries. Follow the glint trail to the cache. As you pass close to "Mossy Knoll" cache, the trail splits. Mark a waypoint at this location. You will need it to find your way back after grabbing the cache. Two glints indicate a change in direction. There are 3 glints at the cache location.
Once you have found the cache, continue on the trail you were taking to an intersection with a wooden post. Follow the trail toward the waypoint you set on the way in, and it will bring you out the short way. No need to backtrack your trail in. There are some glints along this trail but not many as I ran out at this point.
There are two more caches nearby which can both be grabbed at night. "Mossy Knoll" may be a little difficult due to prickers but it is not far from the glint trail you are taking.