Noticed here in a 1907 railroad book that they mention a trail from 2nd Deb to Rainbow Lake. https://dn790005.ca.archive.org/0/items/inmainewoods1907bang/inmainewoods1907bang.pdf
Jessica, welcome to the site. That 1907 book is quite a rare find. Thanks for bringing it to our attention. Maine canoeists should find it historically interesting.