A quick sketch of a Boise rail network.
Boise isn’t a particularly rail-friendly city. It isn’t really big enough to command a true light-rail network. Nor does it have an extensive rail base to build a commuter network from. Frankly, Boise is about as perfectly laid out for BRT as an American city can possibly get.
If they wanted to go with rail, they do have a few good streetcar corridors, however. And that’s this map.