The 2012 Northwest Invitational participants are:
Guilderland (Guilderland, N.Y.) 2011 New York - Section Finalist
Palo Verde (Las Vegas, NV.) 2011 Nevada State Champion
Lincoln (Portland, OR.) 2011 Oregon State Champion
Mercer Island (Mercer Island, WA.) 2011 Washington State Champion
Claremont School (Victoria, B.C.) 2011 British Columbia Provincials
New Westminster (New West, B.C.) 2011 British Columbia Provincials
Charles Best (Coquitlam, B.C.) 2011 British Columbia Provincials
Sunset (Portland, OR.) 2011 Oregon State Runner-up
Bainbridge (Bainbridge Island, WA.) 2011 Washington State Runner-up
Centennial (Las Vegas, NV.) 2011 Nevada State Semifinalist
Bellevue (Bellevue, WA.) 2011 Washington State Semifinalist
Issaquah (Issaquah, WA.) 2011 Washington State Semifinalist
Lakeridge (Lake Oswego, OR.) 2011 Oregon State Semifinalist
Timberline (Boise, ID.) 2011 Idaho State Semifinalist
O.E.S. (Portland, OR.) 2011 Oregon State Quarterfinalist
Lake Washington (Kirkland, WA.) 2011 Washington State Quarterfinalist
Lake Oswego (Lake Oswego, OR.) 2011 Oregon State Quarterfinalist
Skyline (Sammamish, WA.) 2011 Washington State Play-offs