![](http://www.alamy.com/thumbs/6/F967D2C3-00D2-4745-94D8-9AF04C33C13D/W702JM.jpg)
Exposed tree roots are caused by a lack of topsoil. Runners and hikers alike need to be careful while on the trail.
Size: 6000px × 4000px
Photo credit: © Raymond Deleon / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: accidents, branches, brush, change, climate, dangers, directing, directions, drought, ecosystem, environment, erosion, exposed, fallen, falling, giuffrida, global, ground, guiding, hazards, hiking, leaves, logs, markings, nature, outdoors, painted, park, path, roots, running, staying, timber, topsoil, trail, trees, tripping, walking, warming, woods