Intermontane is an adjective that means ‘situated between mountains.’ 

The Latin prefix I-N-T-E-R means ‘between,’ while montanus (mon TAHN oose) means 'mountains.’ Our word of the day’s first known use came in 1807. Here’s an example:

Our intermontane location of the army base made them difficult to find by enemy forces. Unfortunately being located among the mountains also made it difficult to have access to electricity. So we spent a cold six months until the war was over.