1. 1993
Track of the Cat
Guadalupe Mountains National Park, Texas
2. 1994
A Superior Death
Isle Royale National Park, Lake Superior, Michigan
3. 1995
Ill Wind
Mesa Verde National Park, Colorado
4. 1996
Firestorm
Lassen Volcanic National Park, California
5. 1997
Endangered Species
Cumberland Island National Seashore off the coast of Georgia
6. 1998
Blind Descent
Carlsbad Caverns National Park, New Mexico
7. 1999
Liberty Falling
Statue of Liberty and Ellis Island National Monuments, New York City.
8. 2000
Deep South
Natchez Trace Parkway. Mississippi
9. 2001
Blood Lure
Glacier/Waterton National Peace Park, Montana
10. 2002
Hunting Season
Natchez Trace Parkway, Mississippi
11. 2003
Flashback
Dry Tortugas National Park, a grouping of tiny islands seventy miles off Key West
12. 2004
High Country
Yosemite National Park, California
13. 2005
Hard Truth
Rocky Mountains National Park, Colorado
14. 2008
Winter Study
Isle Royale National Park, Lake Superior, Michigan
15. 2009
Borderline
Big Bend National Park, Texas
16. 2010
Burn
New Orleans, Louisiana
17. 2012
The Rope
Glen Canyon National Recreational Area
18. 2014
Destroyer Angel
The Iron Range, Minnesota
19. 2016
Boar Island
Acadia National Park
Maine
