18+ Semi-Pro Division

The 18+ Semi-Pro Division is the flagship division of the NWIBL, featuring the highest level of competition in the Pacific Northwest. Players include former college athletes, ex-minor leaguers, and serious competitive players who want to continue playing at a high level.

The division is split into two sub-divisions: Columbia and Cascadia. Each team plays an 18-game regular season schedule with games on weekends and weeknights. The top teams from each sub-division advance to the playoffs, culminating in the City Championship series in late August.

All-Star selections are made from this division for the annual mid-season showcase game and home run derby.