David Noton / Cyclists riding bikes along riverside path at dawn, near Vang Vieng, Laos, March 2009.

Kirkendall-Spring / Close up on mountain biker's foot pedalling, in Cascade foothills, Washington, USA. April 2013. Model released.

Kirkendall-Spring / Perspective of mountain biker over handlebars, Taylor Canyon, Island In The Sky District. Canyonlands National Park, Utah, October 2012. Model released.

Mark Hamblin / 2020VISION / Mountain bikers on upland path on route to Ben Macdui, Cairngorms National Park, Scotland, UK, August.

Jerry Monkman / Woman mountain biking on a trail in an abandoned granite quarry on Millstone Hill, Barre, Vermont, USA. autumn. Model released, October 2010

Jack Dykinga / Mountain Biker stood on a ridge at sunrise overlooking the Grand Canyon, Grand Canyon NP, Arizona, USA

SCOTLAND: The Big Picture / Family mountain biking through forest, Cairngorms National Park, Scotland, UK, November 2011.

Ashley Cooper / Rapidly receding Brenva Glacier in the Mont Blanc range, Italy, with cyclists. August 2014

Ashley Cooper / Mountain bikers on Mont de la Saxe above Courmayeu, Italy. August 2014

Tim Laman / Cycling on a carriage road along a lake in Acadia National Park, Maine, USA. October 2013. Model released.

Tim Laman / Boy rides his bike over a leaf covered park road in Acadia National Park, Maine, USA. October 2013. Model released.

John Cancalosi / Luhya man cycling, carrying large load of grass for thatching building, Kakamega forest, Kenya, July 2017.