Thunder Ridge
2022
Published in 2022, added by gSotto
2021
Thunder Ridge Ski Area
Published in 2021, added by gSotto
2017
Published in 2017, added by gSotto
2014
Simplified trail network
Published in 2014, added by skimap
2013
Published in 2013, added by GeoSkier
2011
Published in 2011, added by conradward
2009
Published in 2009, added by gSotto
2008
Published in 2008, added by skier
2007
Published in 2007, added by gSotto
2006
Published in 2006, added by gSotto
2005
Published in 2005, added by gSotto
2002
Published in 2002, added by skier
2000
Published in 2000, added by Trailmapguy
1999
Published in 1999, added by gSotto
1996
Big Birch/Thunder Ridge
Published in 1996, added by loafer89
1988
Known as Big Birch
Published in 1988, added by Trailmapguy
1980
Known as Big Birch
Published in 1980, added by Trailmapguy
1962
Published in 1962, added by gSotto