2016           
Chiawana High School (Pasco)
Edmonds-Woodway High School (Edmonds)
Fort Vancouver High School (Vancouver)
John Rogers High School (Puyallup)
Klahowya Secondary (Silverdale)
Lummi Nation School (Bellingham)
Montana School for the Deaf & Blind (Great Falls, Montana)
Sehome High School (Bellingham)
Mount Tahoma High School (Tacoma)
Washington School for the Deaf (Vancouver)

2015           
Edmonds-Woodway High School (Edmonds)
Hellgate High School (Missoula, Montana)
John Rogers High School (Puyallup)
Klahowya Secondary (Silverdale)
Lummi Nation School (Bellingham)
Montana School for the Deaf & Blind (Great Falls, Montana)
Mount Tahoma High School (Tacoma)
Washington School for the Deaf (Vancouver)

2014           
Anacortes High School (Anacortes)
Bremerton High School (Bremerton)
Edmonds-Woodway High School (Edmonds)
Evergreen High School (Vancouver)
John Rogers High School (Puyallup)
Lummi Nation School (Bellingham)
Michigan School for the Deaf (Flint, Michigan)
Montana School for the Deaf & Blind (Great Falls, Montana)
Sehome High School (Bellingham)
Washington School for the Deaf (Vancouver)
Woodinville High School (Woodinville)

2013           
Anacortes High School (Anacortes)
Bremerton High School (Bremerton)
Edmonds-Woodway High School (Edmonds)
Ellensburg High School (Ellensburg)
Montana School for the Deaf & Blind (Great Falls, Montana)
Sehome High School (Bellingham)
Washington School for the Deaf (Vancouver)
Waterville High School (Waterville)
Woodinville High School (Woodinville)

2012                
Academcy of Citizenship and Empowerment (Seatac)
Anacortes High School (Anacortes)
Bremerton High School (Bremerton)
Burlington-Edison High School (Burlington)
Edmonds-Woodway High School (Edmonds)
Klahowya Secordary (Silverdale)
Squalicum High School (Bellingham)
Washington School for the Deaf (Vancouver)
White Pass High School (Randle)

2011                 
Academcy of Citizenship and Empowerment (Seatac)
Anacortes High School (Anacortes)
Burlington-Edison High School (Burlington)
Edmonds-Woodley High School (Edmonds)
Lake Washington High School (Kirkland)
Mercer High School (Mercer)
Orville High School (Orville)
Roosevelt High School (Seattle)
Washington School for the Deaf (Vancouver)

2010                 
Anacortes High School (Anacortes)
Edmonds Woodway High School (Edmonds)
Ferndale High School (Ferndale)
Roosevelt High School (Seattle)
Washington School for the Deaf (Vancouver)

2009                 
Anacortes High School (Anacortes)
Edmonds Woodway High School (Edmonds)
Ferndale High School (Ferndale)
Washington School for the Deaf (Vancouver)

2008                 
None due to cancellation

2007                
Contact me if you (or you know who attended DTL 2007)

2006                
Edmonds-Woodway High School (Edmonds)
Ferndale High School (Ferndale)
Mount Tahoma High School (Tacoma)
Spanaway Lake High School (Spanaway)
Wenatchee High School (Wenatchee)
Goldendale High School (Goldendale)
Tuntutuliak High School (Tunutuliak, AK)
Kamiakin High School (Kennewick)