Below is a list of groups who have participated in Salish Sea Expeditions programs since 1997.  Italics indicate a returning group.

2008
Alderwood Middle School - Lynnwood, WA
Bainbridge High School (x2) - Bainbridge Island, WA
Ballard High School - Seattle, WA
Brighton School- Lynnwood, WA
Bush School - Seattle, WA
Center for Talented Youth - Baltimore, MD (nation-wide students)
Chelan Valley Independent School/Chelan Middle School - Chelan, WA
Duwamish River Cleanup Coalition - Seattle, WA
Eton School - Bellevue, WA
Excel Homeschool Group - Vancouver, WA area
Index Elementary School - Index, WA
Ingraham High School (x2) - Seattle, WA
The Island School - Bainbridge Island, WA
The Journeys School of the Teton Science Schools - Jackson, WY
Madison Middle School - Seattle, WA
Meadowdale Middle School - Lynnwood, WA
Mt. Baker Middle School - Mt. Vernon, WA
Odyssey - Bainbridge Island, WA
Pacific Northern Academy - Anchorage, AK
Peak to Peak School -  Boulder, CO
Rainier Scholars program - Seattle, WA
Spruce Street School - Seattle, WA
St. Catherine Parish - Seattle, WA

2007
Alderwood Middle School - Lynnwood, WA
Bainbridge High School (x2) - Bainbridge Island, WA
Brighton School- Lynnwood, WA
Cascade Middle School - Burien, WA
Clover Park High School - Tacoma, WA
Duwamish River Cleanup Coalition - Seattle, WA
Eastside Preparatory School - Kirkland, WA
Eton School - Bellevue, WA
Hamilton International Middle School - Seattle, WA
International Community School - Kirkland, WA
Ingraham High School - Seattle, WA
The Island School - Bainbridge Island, WA
Jarrow Montessori School - Boulder, CO
The Journeys School of the Teton Science Schools - Jackson, WY
Lake Chelan School District - Chelan, WA
Meadowdale Middle School - Lynnwood, WA
Mt. Baker Middle School - Mt. Vernon, WA
North Central Educ. Service Distr. - Wenatchee, WA
Pacific Northern Academy - Anchorage, AK
Pathfinder K-8 – Seattle, WA
Peak to Peak School -  Boulder, CO
Rainier Scholars program - Seattle, WA
REACH program - Stanwood/Camano, WA
St. Catherine Parish - Seattle, WA
St. George School - Seattle, WA
Seattle Rotary Education Center (YMCA) - Seattle, WA
Waskowitz Environmental Leadership Semester - Burien, WA

2006
Adna Middle/High School - Adna, WA
Bainbridge High School (x2) - Bainbridge Island, WA
Brighton School- Lynnwood, WA
Cascade Middle School - Burien, WA
Cleveland High School - Seattle, WA
Eastside Preparatory School - Kirkland, WA
The Island School - Bainbridge Island, WA
Lighthouse Christian Academy - Gig Harbor, WA
Meadowdale Middle School - Lynnwood, WA
Mt. Baker Middle School - Mt. Vernon, WA
Mount Si High School - Snoqualmie, WA
North Central Educ. Service Distr. - Wenatchee, WA
Pacific Northern Academy - Anchorage, AK
Pathfinder K-8 – Seattle, WA
Peak to Peak School -  Boulder, CO
Rainier Scholars program - Seattle, WA
REACH program (x2) - Stanwood/Port Susan, WA
Room 9/Journey School - Shoreline, WA
St. Catherine Parish - Seattle, WA
Trafton Elementary - Arlington, WA
Whatcom Day Academy - Bellingham, WA
WILD program - Seattle, WA

2005
Bainbridge High School (x2) - Bainbridge Island, WA
Brighton School- Lynnwood, WA
Cedar Way Elementary - Mountlake Terrace, WA
Dearborn Park Elementary - Seattle, WA
Eastside Preparatory School - Kirkland, WA
The Island School - Bainbridge Island, WA
Lighthouse Christian Academy - GIg Harbor, WA
Mt. Baker Middle School - Mt. Vernon, WA
Pacific Science Center, Seattle, WA
Pathfinder K-8  - Seattle, WA
POSSE program - Forks, WA
North Central Educ. Service Distr. - Wenatchee, WA
Rainier Scholars program - Seattle, WA
REACH program (x2) - Stanwood/Port Susan, WA
Room 9/Journey School - Shoreline, WA
St. Catherine Parish - Seattle, WA
Skyline High School - Sammamish, WA
Trafton Elementary - Arlington, WA
WILD program - Seattle, WA

2004
Ballard High School - Ballard, WA
Brighton School (x2) - Lynnwood, WA
Cedar Way Elementary Boys - Mountlake Terrace, WA
Cedar Way Elementary Girls - Mountlake Terrace, WA
Center High School - Seattle, WA
College Place Middle School - Lynnwood, WA
Home Education Exchange - Shoreline, WA
Hood Canal School - Shelton, WA
Jarrow Montessori - Boulder, CO
Mercer Slough (x2)- Bellevue, WA
Monument Elementary - Quincy, WA
Mt. Baker Middle School - Mt. Vernon, WA
New Futures - Seattle, WA
North Central Educ. Service Distr. - Wenatchee, WA
Odyssey - Bainbridge Island, WA
Pacific Northern Academy - Anchorage, AK
REACH - Stanwood/Port Susan, WA
Seattle Aquarium (x2) - Seattle, WA
Stillaguamish Valley Home School - Arlington, WA

2003
Aki Kurose Middle School - Seattle, WA
Boy Scout Troop 598 - Puyallup, WA
Brighton School (x2) - Lynnwood, WA
Cedar Way Elementary Boys - Mountlake Terrace, WA
Cedar Way Elementary Girls- Mountlake Terrace, WA
College Place Middle School - Lynnwood, WA
Federal Way Public Academy (x2) - Federal Way, WA
Gatewood (x4) - West Seattle, WA
Mercer Slough EE Ctr (x2) - Bellevue, WA
Mt. Baker Middle School - Mt. Vernon, WA
North Central Educ. Serv. Dist - Wenatchee
Odyssey - Bainbridge Island, WA
STEP - Seattle, WA

2002
Aki Kurose Middle School - Seattle, WA
Ballard High School - Ballard, WA
Brighton School (x2) - Lynnwood, WA
Cedar Way Elementary - Mountlake Terrace, WA
Eckstein Middle School - Seattle, WA
Edmonds Park & Rec - Edmonds, WA
Federal Way Public Academy - Federal Way, WA
International Community School - Kirkland, WA
Mercer Slough EE Ctr (x2) - Bellevue, WA
Mt. Baker Middle School - Mt. Vernon, WA
North Central School District - Wenatchee, WA
Odyssey - Bainbridge Island, WA
Snohomish High School - Snohomish, WA
Treehouse - Seattle, WA
Valley School - Seattle, WA
Whatcom Day School - Bellingham, WA

2001
Aki Kurose Middle School - Seattle, WA
Arlington High School - Arlington, WA
Asa Mercer Middle School- Seattle, WA
Brighton School (x2) - Lynnwood, WA
Campfire Girls - Bainbridge Island, WA
Eckstein Middle School - Seattle, WA
Edmonds P & R - Edmonds, WA
Franklin High School - Seattle, WA
Mercer Slough EE Ctr. - Bellevue, WA
Northwest Montessori - Seattle, WA
Odyssey - Bainbridge Island, WA
Pathfinder A4 - Seattle, WA
Port Susan Middle - Stanwood, WA
IslandWood - Bainbridge Island, WA
Stanwood High School - Stanwood, WA
Summit K-12 - Seattle, WA
The Little School - Bellevue, WA
The Overlake School - Redmond, WA
Univ. Child Development School - Seattle, WA
Veledare School - Bellevue, WA
Whatcom Day School - Bellingham, WA

2000
American Indian Heritage School - Seattle, WA
Annie Wright High School - Tacoma, WA
Annie Wright Middle School - Tacoma, WA
Arlington High School - Arlingon, WA
College Place Middle - Lynnwood, WA
Eckstein Middle - Seattle, WA
Edmonds Park & Rec - Edmonds, WA
International School - Kirkland, WA
Port Susan Middle School - Stanwood, WA
Sacred Heart (x2) - Bellevue, WA
Spruce St. School - Seattle, WA

1999
Arlington High - Arlington, WA
College Place Middle School(x2) - Lynnwood, WA
Eckstein Middle School- Seattle, WA
Island School - Bainbridge Island, WA
New Options Middle - Seattle, WA
North Mason High School - North Mason, WA

1998
Central Kitsap Junior High - Silverdale, WA
College Place Middle School - Lynnwood, WA
Discovery School - Spokane, WA
Gateway Middle School - Everett, WA
Holy Rosary (x2) - Seattle, WA
International School - Kirkland, WA
Island School - Bainbridge Island, WA
Skykomish Middle & High - Skykomish, WA
Whitman Middle School - Seattle, WA

1997
Annie Wright Middle School - Tacoma, WA
College Place Middle School - Lynnwood, WA
Discovery School - Spokane, WA
Gateway Middle School - Everett, WA
Holy Rosary - Edmonds, WA
Holy Rosary - Seattle, WA
N. Mason High School - North Mason, WA