If you've ever done the Bike ride around this part of Durham you'll know this location. If you're not that fit (like us) you'll almost certainly have stopped here for a rest.
Don't attempt this by car on the morning of 4th September as there will only be foot and bicycle access.
Any other time, this is a park and grab with a pull in area for your car at the entrance to the footpath.
You are looking for a (currently) shiny micro container with just enough room for a log.
Please tighten up after you sign the log.