The greenway trail is a great place to go, be it the spring, summer, fall, or even winter! A place to come with your friends, yourself, or your pooches (please leash 'em up, though, and clean up after 'em!)
This should be available in the winter, and shouldn't disapper if the water gets too high.
Please just remove the top of the cache and grab the log that way. Bring your own writing utensil!
If you are horizontally challenged, you might need somebody with you. I could get to it without issue and I'm (=/-) 5-9. When done here, go check the other caches on the trail!