What's This: old logging equipment parts?
 

A few miles up the Sabbaday Brook Trail, off the Kancamagus Highway, I came upon some rusty metal things propped up against a tree alongside the trail. The 4-5" ends of the metal bands appear deliberately curved and remind me of the ends of an old car's bumpers, although the pieces themselves don't seem strong enough to have been much good as bumpers. There are good sized bolts and nuts still in place. These pieces are at the upper end of a part of the trail that may have been an old logging road, perhaps a century ago. Does anyone know what these pieces are?

Looks like “something” off of an old vehicle. Is it all one piece or is the one on the ground NOT attached to the ones going up the tree?

I didn't handle it, but it looked like two separate pieces. The one on the left appears to be two pieces by itself, bolted or welded together, but with the ends separated away from the middle, unless they aren't connected and it's just a third piece resting against the other. I shot the two pictures from different angles, about 90 degrees apart.

Still hard to make out but sled runners come to mind...

Old Logging Trail, A Clue?
 

Could the pieces be re-assembled to make a "skid" for oxen to drag logs?