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Gruppo de modificationes Quando Commento
20751244 plus de 7 annos retro

This is a mistake, it's a single (in my case, bicycle)

50154823 circa 8 annos retro

I remember it was green but I might be mistaken (it was hot that day :-) )
BTW, the entry to the trail from the east side is also double and not a single as seen in the map