Han, First off, to be technical, Boise is in the Northwest league, which is a Short Season Single A league. SS Single A is a little bit higher skill/experience and generally a lot more professional fan experience than true "rookie" league or even the "Rookie Advanced" league the Appalachian is considered. For example, the largest city in the Appalachian league I believe is Johnson City, with less than 70,000 people. In the Northwest League in addition to Boise you have Everett, Eugene, Spokane, Hillsboro (right outside Portland) and even Vancouver! Much larger areas all around. The geographic anomaly isn't so much about the bus rides, it's about the league locations. The three Double-A leagues are in the northeast US, the southeast US, and Texas, so Boise can't join any of them. The Midwest and California leagues are too far for such an outlier as well. It'd be a stretch to say Boise is a triple-A sized city/region, but the PCL arguably would have made the most sense. Salt Lake, Reno, and Tacoma would work well in a division with Boise. However, their opportunity probably went away when Edmonton, Calgary, and Vancouver all moved south.