If coming from caribou take 89 off the railroad bed. Stay on 89 you will come to a intersection you will see a big yellow sign says Bunker Inn on the top of the sign (can’t miss it, ha ha). Take that left, there that’s it your on the base

Club trail 100A and 81A will get you to Loring

100 A will take you around the outside of the base

100B will take you down the runway loop around the arch hanger and what not

A little bit of history from wiki can be found here