yep! you can, but you need to be standing in front of the fence, then use the bolt cutter on it from the items menu. You can get the bolt cutter after giving Rune some runes, I forgot how many you need to give him to get the bolt cutter, shouldn't be more than 3 though.
Yeah, we need to give Rune two runestones at the tree house. But to cross the blockade, it is recommended that you do not change the bolt cutters, keep one, and you can exchange some important tools with the runes in the backOwO