The National Hockey League (NHL) holds outdoor games under three distinct brands: Heritage Classic, Winter Classic, and Stadium Series.
Since 2010, the ice for all of these games was made using REALice® technology.
Here is an overview of all those venues:
NHL Winter Classics
- 2010 Fenway Park, Boston, MA
- 2011 Heinz Field, Pittsburgh, PA
- 2012 Citizens Bank Park, Philadelphia, PA
- 2014 Michigan Stadium, Ann Arbor, MI
- 2015 Nationals Park, Washington, DC
- 2016 Boston, MA
NHL Heritage Classic
- 2011, McMahon Stadium, Calgary, AB
- 2014, BC Place, Vancouver, BC
NHL Stadium Series
- 2014, January 25th, Dodger Stadium, Los Angeles
- 2014, January 26th, Yankee Stadium, New York City
- 2014, January 29th, Soldier Field, Chicago, Il
- 2016 Minneapolis, MN
- 2016 Denver, CO
Media coverage commenting on the ice quality:
http://www.nhl.com/ice/news.htm?id=795500
http://www.komonews.com/sports/Miracle-of-ice-NHL-readies-outdoor-rink-at-sunny-Dodger-Stadium-241744421.html