The high difficulty rating is due to the travel involved to get 50 virtuals, since no new Virtual geocaches are being allowed. if you are in the area and want to sign the log prior to completing the requirements, you may do so, but you cannot log as "Found" until completing the requirements. Your finds may be from anywhere in the world, not just Missouri. The cache is available 24/7. Please bring your own pen. For the record, I have found 63 virtual caches of this date. While at this location, why not drive a little down the road get the 50 Earthcache Challenge? It kind of inspired me to put this challenge cache here.