Yes it is, the Paul Bunyan Trail runs right behind my house so I suspect that's where it came from. I can't get over how nice a shape its in. Now if I only had a key.
Go to a locksmith (Look in Yellow pages) and see if a key could be made for your lock. To have a key would double the value of your lock. It might cost you $20 at most, but it would be worth it. Also, look on eBay for corresponding lock prices to get a value of your lock......it is very nice.