Date | Venue | City | Second Venue | Location |
|---|---|---|---|---|
| 1985-12 | St. Matthew Roman Catholic | Hillsboro | ||
| 1986-03 | Trinity Lutheran | Hillsboro | Forest Grove United Church of Christ | Forest Grove |
| 1986-06 | St. Matthew Roman Catholic | Hillsboro | ||
| 1986-12 | First United Methodist | Beaverton | St. Matthew Roman Catholic | Hillsboro |
| 1986-12 | Fujitsu | Hillsboro | Christmas party | |
| 1987-03 | Evergreen Junior High School | Hillsboro | St. Helens Senior High School | St. Helens |
| 1987-06 | St. Matthew Roman Catholic | Hillsboro | First Unitarian | Portland |
| 1987-12 | St. Matthew Roman Catholic | Hillsboro | St James Episcopal | Tigard |
| 1987-12 | Fujitsu | Hillsboro | Christmas party | |
| 1988-03 | Terwilliger Plaza | Portland | Elsie Stuhr Center | Beaverton |
| 1988-06 | St. Bartholomew Episcopal | Beaverton | Forest Grove United Church of Christ | Forest Grove |
| 1988-12 | Good Shepherd Lutheran | Portland | First Baptist | Hillsboro |
| 1989-03 | Wynnwood Assisted Living | Forest Grove | Old Scotch Church | Hillsboro |
| 1989-06 | First Baptist | Hillsboro | St. Bartholomew Episcopal | Beaverton |
| 1989-06 | Red Lion Jantzen Beach | Portland | Flying Farmers of America | |
| 1989-12 | First Baptist | Hillsboro | Westminster Presbyterian | Portland |
| 1990-02 | The Old Church | Portland | Needham wedding | |
| 1990-03 | Cornell Estates | Hillsboro | Forest Grove Senior Center | Forest Grove |
| 1990-06 | First Baptist | Hillsboro | First Congregational United Church of Christ | Portland |
| 1990-12 | First Baptist | Hillsboro | First United Methodist | Portland |
| 1991-03 | Cornell Estates | Hillsboro | Pacific Point Retirement Inn | King City |
| 1991-04 | Southminster Presbyterian | Beaverton | mix of Food concert & other pieces | |
| 1991-06 | First Baptist | Hillsboro | Bethel Congregational United Church of Christ | Beaverton |
| 1991-12 | First Baptist | Hillsboro | Beaverton Seventh Day Adventist | Beaverton |
| 1991-12 | Black Angus | Salem | Knife & Fork Club Christmas party | |
| 1992-03 | Hillsboro Senior Center | Hillsboro | St. Matthew Lutheran | Beaverton |
| 1992-06 | First Baptist | Hillsboro | St Andrew Presbyterian | Portland |
| 1992-12 | First Baptist (cancelled) | Hillsboro | St. Luke Lutheran | Portland |
| 1993-03 | Southminster Presbyterian | Beaverton | Hillsboro Senior Center | Hillsboro |
| 1993-06 | First Baptist | Hillsboro | Beaverton Seventh Day Adventist | Beaverton |
| 1993-12 | First Baptist | Hillsboro | Bethel Congregational United Church of Christ | Beaverton |
| 1993-12 | The Grotto | Portland | and most years thereafter (93-16) | |
| 1994-03 | First United Methodist | Hillsboro | Forest Grove Senior Center | Forest Grove |
| 1994-06 | First Baptist | Hillsboro | Taylor-Meade Center | Forest Grove |
| 1994-12 | First Baptist | Hillsboro | Tigard Christian | Tigard |
| 1995-03 | Hillsboro Senior Center | Hillsboro | ||
| 1995-06 | Taylor-Meade Center | Forest Grove | First United Methodist | Portland |
| 1995 | St. Pius Roman Catholic | Cedar Mill | Valko wedding | |
| 1996-09 | United Methodist | Seaside | Choral workshop | |
| 1995-12 | Bethel Congregational United Church of Christ | Beaverton | First Baptist | Hillsboro |
| 1996-03 | Southminster Presbyterian | Beaverton | Forest Grove Senior Center | Forest Grove |
| 1996-06 | Taylor-Meade Center | Forest Grove | St. Luke Lutheran | Portland |
| 1996-12 | First Baptist | Hillsboro | Calvin Presbyterian | Tigard |
| 1997-03 | Hillsboro Senior Center | Hillsboro | Forest Grove Senior Center | Forest Grove |
| 1997-06 | First Baptist | Hillsboro | First United Methodist | Portland |
| 1997-12 | First Baptist | Hillsboro | Southminster Presbyterian | Beaverton |
| 1998-03 | Forest Grove United Methodist | Forest Grove | Elsie Stuhr Center | Beaverton |
| 1998-06 | Century Senior High School | Hillsboro | Living Savior Lutheran | Tualatin |
| 1998-12 | First Baptist | Hillsboro | Calvin Presbyterian | Tigard |
| 1999-03 | Elsie Stuhr Center | Beaverton | Forest Grove Senior Center | Forest Grove |
| 1999-04 | Linn-Benton Community College | Albany | Choir festival | |
| 1999-06 | Century Senior High School | Hillsboro | Beaverton Seventh Day Adventist | Beaverton |
| 1999-12 | First Baptist | Hillsboro | Bethel Congregational United Church of Christ | Beaverton |
| 2000-03 | Community Church of Cedar Hills | Beaverton | Forest Grove Senior Center | Forest Grove |
| 2000-06 | Orenco Presbyterian | Hillsboro | Calvin Presbyterian | Tigard |
| 2000-12 | First Baptist | Hillsboro | Bethel Congregational United Church of Christ | Beaverton |
| 2001-03 | Living Savior Lutheran | Tualatin | Century Senior High School | Hillsboro |
| 2001-06 | First Unitarian | Portland | Forest Grove United Church of Christ | Forest Grove |
| 2001-12 | First Baptist | Hillsboro | Bethel Congregational United Church of Christ | Beaverton |
| 2002-03 | Century Senior High School | Hillsboro | Living Savior Lutheran | Tualatin |
| 2002-06 | First Unitarian | Portland | St. Matthew Roman Catholic | Hillsboro |
| 2002-12 | Warner-Pacific College | Portland | St. Matthew Roman Catholic | Hillsboro |
| 2003-03 | Glencoe Senior High School | Hillsboro | Moses Hogan Tribute | |
| 2003-03 | Hillsboro Senior High School | Hillsboro | Hillsboro Senior High School | Hillsboro |
| 2003-06 | Warner-Pacific College | Portland | St. Matthew Roman Catholic | Hillsboro |
| 2003-12 | St. Matthew Roman Catholic | Hillsboro | Central Lutheran | Portland |
| 2004-03 | St. Matthew Roman Catholic | Hillsboro | Central Lutheran | Portland |
| 2004-06 | Central Lutheran | Portland | St. Matthew Roman Catholic | Hillsboro |
| 2004-08 | Liberty Theatre | Astoria | Astoria Regatta | |
| 2004-12 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2005-03 | Hillsboro Senior High School | Hillsboro | ||
| 2005-06 | Tigard United Methodist | Tigard | Taylor-Meade Center | Forest Grove |
| 2005 | St. Francis Roman Catholic | Sherwood | Valko vow renewal | |
| 2005? | School of Arts & Academics | Vancouver | special request | |
| 2005? | Tualatin Senior High School | Tualatin | don't remember | |
| start date? | Arlene Schnitzer Concert Hall | Portland | OSO preludes (ongoing) | |
| 2005-12 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2006-03 | Tigard United Methodist | Tigard | Hillsboro Civic Center | Hillsboro |
| 2006-06 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2006-12 | Taylor-Meade Center | Forest Grove | St. Matthew Roman Catholic | Hillsboro |
| 2007-03 | Liberty Senior High School | Hillsboro | ||
| 2007-06 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2007-12 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2008-03 | Hillsboro Senior High School | Hillsboro | ||
| 2008-06 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2008-11 | Parish of St. Mark Episcopal | Portland | and several times thereafter | |
| 2008-12 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2008-12 | Sonrise Church | Hillsboro | ||
| 2009-03 | Liberty Senior High School | Hillsboro | Liberty Senior High School | Hillsboro |
| 2009-06 | Bethel Congregational United Church of Christ | Beaverton | St. Matthew Roman Catholic | Hillsboro |
| 2009-12 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2010-03 | Century Senior High School | Hillsboro | Century Senior High School | Hillsboro |
| 2010-06 | Living Savior Lutheran | Tualatin | St. Matthew Roman Catholic | Hillsboro |
| 2010-12 | St. Gabriel Episcopal | Cedar Mill | St. Matthew Roman Catholic | Hillsboro |
| 2010-12 | Westminster Presbyterian | Portland | St. Matthew Roman Catholic | Hillsboro |
| 2011-03 | St. Gabriel Episcopal | Cedar Mill | Century Senior High School | Hillsboro |
| 2011-06 | Living Savior Lutheran | Tualatin | St. Matthew Roman Catholic | Hillsboro |
| 2011-12 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2011-12 | St. Marys Roman Catholic Cathedral | Portland | St. Matthew Roman Catholic | Hillsboro |
| 2012-03 | Hillsboro Senior High School | Hillsboro | ||
| 2012-06 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2012-08 | Agnes Flanagan Chapel, Lewis & Clark College | Portland | ||
| 2012-12 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2012-12 | St. Henrys Roman Catholic | Gresham | St. Matthew Roman Catholic | Hillsboro |
| 2013-03 | Century Senior High School | Hillsboro | St. Andrews Epis | Tacoma |
| 2013-06 | Tigard United Methodist | Tigard | St. Matthew Roman Catholic | Hillsboro |
| 2013-12 | Living Savior Lutheran | Tualatin | Century Senior High School | Hillsboro |
| 2014-03 | First United Methodist | Beaverton | Hillsboro Senior High School | Hillsboro |
| 2014-06 | Living Savior Lutheran | Tualatin | Hillsboro Senior High School | Hillsboro |
| 2014-12 | Living Savior Lutheran | Tualatin | St. Matthew Roman Catholic | Hillsboro |
| 2015-03 | Living Savior Lutheran | Tualatin | St. Matthew Roman Catholic | Hillsboro |
| 2015-06 | Living Savior Lutheran | Tualatin | Taylor-Meade Center | Forest Grove |
| 2015-12 | Living Savior Lutheran | Tualatin | St. Matthew Roman Catholic | Hillsboro |
| 2016-03 | Living Savior Lutheran | Tualatin | St. Matthew Roman Catholic | Hillsboro |
| 2016-06 | Living Savior Lutheran | Tualatin | St. Matthew Roman Catholic | Hillsboro |
| 2016-12 | Living Savior Lutheran | Tualatin | St. Matthew Roman Catholic | Hillsboro |
| 2017-03 | Living Savior Lutheran | Tualatin | St. Matthew Roman Catholic | Hillsboro |
| 2017-06 | Bethel Congregational United Church of Christ | Beaverton | Bethel Congregational United Church of Christ | Beaverton |
| 1989-07 | Worms Roman Catholic Cathedral | Worms | Germany | |
| 1989-07 | St. Ulrich & Afra Cuhrch | Augsburg | Germany | |
| 1989-07 | Marktplatz | Rothenburg | Germany | |
| 1989-07 | St. Peter & St. Paul Church | Oberammergau | Germany | |
| 1989-07 | Ettal Monastery | Ettal | Germany | |
| 1989-07 | Pfarrkirche Roman Catholic Allegemeinhof ? | Innsbruck | Austria | |
| 1989-07 | St. Blasius | Salzburg | Austria | |
| 1989-07 | Kurzentrum Spa | Bad Tatzmannsdorf | Austria | |
| 1989-07 | Hofbrauhaus | Munich | Germany | |
| 1989-07 | Altenheim (there are several) | Munich | Germany | |
| 1993-07 | Westminster Roman Catholic Cathedral | London | England, UK | |
| 1993-07 | St. Denys Walmgate Anglican | York | England, UK | |
| 1993-07 | Craigmillar Park Church of Scotland Church | Edinburgh | Scotland, UK | |
| 1993-07 | Hotel Derwent Water | Keswick | England, UK | |
| 1993-07 | Wesley Methodist Church | Chester | England, UK | |
| 1993-07 | St. Collens Anglican | Llangollen | Wales, UK | |
| 1993-07 | Pittville Pump Room | Cheltenham | England, UK | |
| 1993-07 | Bath Abbey | Bath | England, UK | |
| 1998-07 | any? | Denmark | ||
| 1998-07 | St. Nicolai Lutheran | Halmstad | Sweden | |
| 1998-07 | Växjö Lutheran Cathedral | Vaxjo | Sweden | |
| 1998-07 | St. Jacobs Lutheran | Stockholm | Sweden | |
| 1998-07 | Bromma Lutheran | Stockholm | Sweden | |
| 1998-07 | Maria Magdalena Lutheran | Stockholm | Sweden | |
| 1998-07 | hotel | Lillehammer | Norway | |
| 1998-07 | outdoors | Laerdal | Norway | |
| 1998-07 | Gamla Aker Lutheran | Oslo | Norway | |
| 1998-07 | National Gallery | Oslo | Norway | |
| 2003-07 | Tuomiokirkko Lutheran | Helsinki | Finland | |
| 2003-07 | Temppeliaukio Lutheran | Helsinki | Finland | |
| 2003-07 | Uspenski Russian Orthodox Cathedral | Helsinki | Finland | |
| 2003-07 | Swedish St. Michaels Lutheran | Tallinn | Estonia | |
| 2003-07 | Ave Sol Church | Riga | Latvia | |
| 2003-07 | St. Peters Lutheran Baznica | Riga | Latvia | |
| 2003-07 | Vilnius Town Hall | Vilnius | Lithuania | |
| 2003-07 | Bazylika Mariacka Roman Catholic | Gdansk | Poland | |
| 2003-07 | Oliwa Cathedral Roman Catholic | Gdansk | Poland | |
| 2003-07 | hotel | Dresden | Germany | |
| 2003-07 | St. Thomas Lutheran | Leipzig | Germany | |
| 2003-07 | Stadtkirche Lutheran | Wittenberg | Germany | |
| 2003-07 | Berliner Dom Lutheran | Berlin | Germany | |
| 2008-06 | St. Mungos Church of Scotland Cathedral | Glasgow | Scotland, UK | |
| 2008-06 | outdoors | Loch Lomond | Scotland, UK | |
| 2008-06 | Inveraray Castle | Inveraray | Scotland, UK | |
| 2008-06 | St. Andrews Anglican Cathedral | Inverness | Scotland, UK | |
| 2008-06 | Dunkeld Church of Scotland Cathedral | Dunkeld | Scotland, UK | |
| 2008-06 | Stirling Castle | Stirling | Scotland, UK | |
| 2008-06 | Belfast Maritime Festival | Belfast | Northern Ireland, UK | |
| 2008-06 | Fisherwick Presbyterian | Belfast | Northern Ireland, UK | |
| 2008-06 | Christ Chuich Church of Ireland Cathedral | Dublin | Ireland | |
| 2008-07 | St. Marys Roman Catholic Cathedral | Killarney | Ireland | |
| 2008-07 | Adare Village Heritage Center | Adare | Ireland | |
| 2008-07 | Bunratty Folk Park | Bunratty | Ireland | |
| 2008-07 | St. Augustines Roman Catholic | Limerick | Ireland | |
| 2014-07 | Gothic Black Church Lutheran | Brasov | Romania | |
| 2014-07 | Szent Miklos Roman Catholic | Budapest | Hungary | |
| 2014-07 | Basilika Roman Catholic | Esztergom | Hungary | |
| 2014-07 | St. Peters Roman Catholic | Vienna | Austria | |
| 2014-07 | St. Martin Roman Catholic Cathedral | Bratislava | Slovakia | |
| 2014-07 | Dreveny Lutheran Church | Hronsek | Slovakia | |
| 2014-07 | Assumption of St. Mary Roman Catholic | Banska Bystrica | Slovakia | |
| 2014-07 | St. James Roman Catholic | Levoca | Slovakia | |
| 2014-07 | Wieliczka Chapel Roman Catholic | Wieliczka | Poland | |
| 2014-07 | St. Catherines Roman Catholic | Krakow | Poland | |
| 2014-07 | St. Vitus Roman Catholic Cathedral | Prague | Czech Republic | |
| 2014-07 | American Embassy | Prague | Czech Republic | |
| 2014-07 | St Lawrence under Petřín Old Catholic | Prague | Czech Republic |
Sixty-Voice Symphonic Choir | Hillsboro, OR