Along the Historic Champlain Canalway Trail in the Town of Halfmoon, NY, which is on the towpath of the Historic Champlain Canal, completed in 1823; photo by Kim Martin
Along the Historic Champlain Canalway Trail; the Canal is still watered in many places, and supports wetland habitat; photo by Kim Martin
Two miles of the trail is an improved, stone dust trail that is eight feet wide; Historic Champlain Canalway Trail in the Town of Halfmoon, NY; photo by Kim Martin
The 1823 Lock is well preserved, and watertight 175 years later; Historic Champlain Canalway Trail, Halfmoon, NY; photo by Kim Martin
"Serengeti Sunrise" on the Poudre River Trail, Greeley CO, near dog park at 59th Avenue and F street; Photo by Kate Stewart
This year, 500 visitors and 500 students participated in collecting data along the boardwalk on Prothonotary Warblers; Audubon Center at the Francis Beidler Forest, Harleyville, SC; photo by Mark Musselman
White Ibis adult and juvenile on the boardwalk handrail either resting or digesting their crayfish meal; Four Holes Swamp National Recreation Trail, Harleyville, SC; photo by Mark Musselman
This male Prothonotary Warbler is investigating a heart-shaped cavity in a cypress knee along the boardwalk, Audubon Center at the Francis Beidler Forest; photo by Mark Musselman
Barred Owl perched low over the swamp in search of crayfish prey along the boardwalk, Audubon Center at the Francis Beidler Forest; photo by Mark Musselman
This shy Pileated Woodpecker is investigating a fallen tree along the Four Holes Swamp National Recreation Trail; Audubon Center at the Francis Beidler Forest, Harleyville, SC; photo by Mark Musselman
Resurrection Pass Trail in Alaska on the Chugach National Forest; Photo by Nancy Gehm
Resurrection Pass Trail in Alaska on the Chugach National Forest; Photo by Nancy Gehm
Resurrection Pass Trail in Alaska on the Chugach National Forest; Photo by Nancy Gehm
Resurrection Pass National Recreation Trail in Alaska on the Chugach National Forest; photo by Pat O'Leary
Reclamation and urban renewal development project in East Moline, IL along the Great River National Recreation Trail
Park in Rock Island, IL as trail veers onto Mississippi River levee, along the Great River National Recreation Trail
Hiker reaches the end of the slot on Tent Rocks National Recreation Trail, Kasha-Katuwe Tent Rocks National Monument, New Mexico; Photo by Stephen Ausherman
Golden Pea grows alongside the upper Tent Rocks Trail, Kasha-Katuwe Tent Rocks National Monument, NM; photo by Stephen Ausherman
Hiker follows Tent Rocks Trail into the slot canyon. Kasha-Katuwe Tent Rocks National Monument, New Mexico; Photo by Stephen Ausherman
Hoodoos in silhouette overlook the lower Tent Rocks Trail. Kasha-Katuwe Tent Rocks National Monument, New Mexico; Photo by Stephen Ausherman