In Iowa, United States
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Posted hours for the park are from 6 AM until 10:30 PM. This cache is located on public hunting grounds so please take precautions during hunting seasons.
This cache is named after the deepest trench in the ocean for a good reason. The terrain here is steep and you can expect a good climb at GZ.
My coordinate readings vary a good deal at the cache location. Use your geosense on this one and consider the cache size and you should be able to find it.
***Jackpine-Savage earns the FTF for this one***
Last Updated: on 1/1/2015 6:23:50 PM (UTC-08:00) Pacific Time (US & Canada) (2:23 AM GMT)
Coordinates are in the WGS84 datum