I was wondering if that concrete thing was a silo but it's in an odd place for a silo. It's along a steep grade between switch backs. The river is just below though so that might be why it's there.
Slowpoke, You'll have to figure out how to get to this side of the U.S. one of these day and come out to the Hells Canyon gathering. It's a lot of fun with tons of great riding. I see you found the picture thread.
Many of the following pictures will be repeats for you but there are others I will be adding in here so hang out and enjoy the ride.