Jerry Monkman / A winter hiker's crampon equipped boot on Mount Clay above the Great Gulf, Gulfside Trail, Northern Presidential mountain range, White Mountains, New Hampshire, USA. Model Released. March 2008

Philippe Clement / Hiking boots drying out in tundra, Denali NP, Alaska, USA.

Kevin Schafer / Moss on abandoned hiking boots, Finger Bay, Adak Island, Aleutian Islands, Alaska

Oriol Alamany / Hiker Eulàlia Vicens disinfecting her boots before entering Little Island trail, Lord Howe island, Lord Howe Island Group UNESCO Natural World Heritage Site, New South Wales, Australia, October 2012....

Kirkendall-Spring / Boots and gators left out to dry at Walbran Creek Camp, along the West Coast Trail, Pacific Rim National Park Reserve, British Columbia, Canada, May 2015.

Pal Hermansen / Waymarker on hiking trail in the mountains, Norway, September 2010.

Kirkendall-Spring / Hiker's feet in boots walking across the Plains of Abraham on the Loowit Trail #216 in Mount St Helens National Volcanic Monument. Washington, USA, August 2011.

Kirkendall-Spring / Hiker's legs and boots crossing the Plains of Abraham on the Loowit Trail #216 in Mount St Helens National Volcanic Monument. Washington, USA, August 2011. Model released.

Kirkendall-Spring / Hiker's feet in walking boots on the Observation Peak Trail #132 in the Trapper Creek Wildernes. Washington, USA, August 2011. Model released.

Niall Benvie / Hiking boots on the move. Scotland. Model released

Oriol Alamany / Hiking boots and backpacks at the entrance of Grey mountain hut, trekking in National Park Torres del Paine, Patagonia, Chile

Ernie Janes / Walker walking through Cowslips (Primula veris) in wildflower meadow, UK