Hikers pointing, Dusy Basin. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39716.html Backpacker on the Appalachian Trail. Shenandoah National Park, Virginia, USA. http://www.terragalleria.com/parks/np-image.shen6888.html Hiker on trail. Big Basin Redwoods State Park, California, USA http://www.terragalleria.com/california/picture.usca30519.html Backpacker on Bishop Pass trail, Inyo National Forest. California, USA http://www.terragalleria.com/california/picture.usca9883.html Backpacker walking on Greenstone ridge trail. Isle Royale National Park, Michigan, USA. http://www.terragalleria.com/parks/np-image.isro1858.html Hikers in Wall Street Gorge. Bryce Canyon National Park, Utah, USA. http://www.terragalleria.com/parks/np-image.brca0854.html Backpacker going up Nidever canyon trail, San Miguel Island. Channel Islands National Park, California, USA. http://www.terragalleria.com/parks/np-image.chis10715.html Summit trail after a snow-storm, Mt Diablo State Park. California, USA http://www.terragalleria.com/california/picture.usca9465.html Couple hiking on trail amongst wildflowers near Hidden Lake. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34186.html Horseman speaking with hikers, Dusy Basin. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39720.html Hikers on trail below Biship Pass, Dusy Basin. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39820.html Group of hikers on faint trail, Sunol Regional Park. California, USA http://www.terragalleria.com/california/picture.usca35147.html Two backpackers descending on trail near Logan Pass. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34172.html Many Glacier Valley with Grinnell Lake and Josephine Lake. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34115.html Hikers in Dusy Basin, morning. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39714.html Hiker heading towards Biship Pass, Dusy Basin. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39821.html Valley and Long Lake, John Muir Wilderness. California, USA http://www.terragalleria.com/california/picture.usca39843.html Backpacker on trail above Tapeats Creek. Grand Canyon National Park, Arizona, USA. http://www.terragalleria.com/parks/np-image.grca8518.html Backpackers below Kearsarge Pass. Kings Canyon National Park, California, USA. http://www.terragalleria.com/parks/np-image.kica5806.html Group of Hikers on a distant trail, Mt Diablo State Park. California, USA http://www.terragalleria.com/california/picture.usca10089.html Backpackers in valley near Rae Lakes, Kings Canyon National Park. California http://www.terragalleria.com/mountain/mountain-image.kica5811.html Backpackers on Esplanade, Thunder River and Deer Creek trail. Grand Canyon National Park, Arizona, USA. http://www.terragalleria.com/parks/np-image.grca8513.html Hiker on trail above Saddlebag Lakes, John Muir Wilderness. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.usca39832.html Close view of hikers, Dusy Basin. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39719.html Tourists standing amongst redwood trees. Big Basin Redwoods State Park, California, USA http://www.terragalleria.com/california/picture.usca30525.html Couple hiking down Harding Icefied trail, late afternoon. Kenai Fjords National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kefj36670.html Hikers surrounded by wildflowers on Harding Icefield trail. Kenai Fjords National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kefj36778.html Hikers descending trail in Wall Street Gorge. Bryce Canyon National Park, Utah, USA. http://www.terragalleria.com/parks/np-image.brca0855.html Switchback on trail, with Grinnel Lake and Josephine Lake in the background. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34116.html Women hiking on the Grinnell Glacier trail. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34109.html Hikers on trail to Point Bennett, San Miguel Island. Channel Islands National Park, California, USA. http://www.terragalleria.com/parks/np-image.chis10723.html Hikers on trail amongst wildflowers near Hidden Lake. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34192.html Navajo Trail descending between Hoodoos. Bryce Canyon National Park, Utah, USA. http://www.terragalleria.com/parks/np-image.brca0852.html Hikers at Bishop Pass, John Muir Wilderness. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.usca39830.html Backpackers near a tarn below Glen Pass, Kings Canyon National Park. California http://www.terragalleria.com/mountain/mountain-image.kica5808.html Women with child carrier backpacks on Harding Icefield trail. Kenai Fjords National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kefj36780.html Hiking surrounded by wildflowers on Harding Icefield trail. Kenai Fjords National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kefj36779.html Hikers below Bishop Pass, John Muir Wilderness. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.usca39831.html Hiker on trail towards Round Top, late afternoon. Mokelumne Wilderness, Eldorado National Forest, California, USA http://www.terragalleria.com/california/picture.usca9786.html Walking under a small waterfall on the Grinnell Glacier trail. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34108.html Tourists amongst redwood trees. Big Basin Redwoods State Park, California, USA http://www.terragalleria.com/california/picture.usca30527.html Hikers on trail above Lake Josephine. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34104.html Backpackers hiking up from Saddlebag Lakes, John Muir Wilderness. California, USA http://www.terragalleria.com/california/picture.usca39835.html Hiking down Mt Whitney in cold conditions. California http://www.terragalleria.com/mountain/mountain-image.sequ11555.html Hiking on trail, Dusy Basin. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39685.html Backpacker pausing on Greenstone ridge trail. Isle Royale National Park, Michigan, USA. http://www.terragalleria.com/parks/np-image.isro1859.html Hiker with panoramic view on Navajo Trail. Bryce Canyon National Park, Utah, USA. http://www.terragalleria.com/parks/np-image.brca0856.html Man filtering water from stream, John Muir Wilderness. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.usca39836.html Hiker on trail at the summit of Mission Peak, Mission Peak Regional Park. California, USA http://www.terragalleria.com/california/picture.usca9448.html Descending Mt Whitney trail near sunset. California http://www.terragalleria.com/mountain/mountain-image.sequ11574.html Hikers on trail above Le Conte Canyon. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39736.html Two people hiking down Harding Ice Field trail. Kenai Fjords National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kefj36671.html Hikers on Harding Icefield trail. Kenai Fjords National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kefj36777.html Hiking down the Grinnell Glacier trail, afternoon. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34114.html Hikers on trail above Saddlebag Lakes, John Muir Wilderness. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.usca39833.html Hiker on trail amongst fall colors, Hot Spring Mountain. Hot Springs National Park, Arkansas, USA. http://www.terragalleria.com/parks/np-image.hosp38300.html Trail markers on the top of Ayers Rock. Uluru-Kata Tjuta National Park, Northern Territories, Australia http://www.terragalleria.com/pacific/australia/ayers-rock/picture.aust2511.html Hikers on trail overlooking Grinnell Lake. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34111.html Hikers on alpine terrain and Mt Giraud range, Dusy Basin. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39718.html Couple hiking on trail, with Grinnell Lake below. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34105.html Backpacker and peak near Logan Pass. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34194.html Ascending Ayers Rock. Uluru-Kata Tjuta National Park, Northern Territories, Australia http://www.terragalleria.com/pacific/australia/ayers-rock/picture.aust6175.html Mountains with snowboarder hiking down on snow-covered trail. Kenai Fjords National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kefj36708.html Navajo Trail in winter. Bryce Canyon National Park, Utah, USA. http://www.terragalleria.com/parks/np-image.brca0851.html Women Park rangers on trail during a field study. Kenai Fjords National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kefj36775.html Hiker silhouetted, lower Dusy Basin. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39721.html Mountains and sea of clouds, hiker on snow-covered trail. Kenai Fjords National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kefj36709.html Hikers on the Chesler Park trail, the Needles. Canyonlands National Park, Utah, USA. http://www.terragalleria.com/parks/np-image.cany10654.html Tourists look at redwood trees. Big Basin Redwoods State Park, California, USA http://www.terragalleria.com/california/picture.usca30523.html Hiking down Mt Whitney at sunset. California http://www.terragalleria.com/mountain/mountain-image.sequ11556.html Woman hiking on trail near Mt Edith Cavell. Jasper National Park, Canadian Rockies, Alberta, Canada http://www.terragalleria.com/north-america/canada/jasper/picture.caab33805.html Backpackers in Surprise Valley, Thunder River and Deer Creek trail. Grand Canyon National Park, Arizona, USA. http://www.terragalleria.com/parks/np-image.grca8514.html Family hiking on trail amongst wildflowers near Hidden Lake. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34193.html Hikers and Mt Giraud, Dusy Basin. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39717.html Woman crossing stream on rocks, John Muir Wilderness. California, USA http://www.terragalleria.com/california/picture.usca39837.html Father and son on trail above Long Lake, John Muir Wilderness. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.usca39828.html Hikers looking at map and pointing, Dusy Basin. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39715.html Hikers on trail, Dusy Basin. Kings Canyon National Park, California http://www.terragalleria.com/mountain/mountain-image.kica39684.html Summit trail after a snow-storm, Mt Diablo State Park. California, USA http://www.terragalleria.com/california/picture.usca9464.html Backpackers descending from Bishop Pass, John Muir Wilderness. California, USA http://www.terragalleria.com/california/picture.usca39829.html Hiker and saguaro cactus, Hugh Norris Trail. Saguaro National Park, Arizona, USA. http://www.terragalleria.com/parks/np-image.sagu32843.html Women carrying infants on trail. Kenai Fjords National Park, Alaska, USA. http://www.terragalleria.com/parks/np-image.kefj36781.html Backpacker on Esplanade, Thunder River and Deer Creek trail. Grand Canyon National Park, Arizona, USA. http://www.terragalleria.com/parks/np-image.grca8512.html Hiker on a trail below Angel Glacier. Jasper National Park, Canadian Rockies, Alberta, Canada http://www.terragalleria.com/north-america/canada/jasper/picture.caab33801.html Group hiking on the Grinnell Glacier trail. Glacier National Park, Montana, USA. http://www.terragalleria.com/parks/np-image.glac34107.html Hikers descending Hugh Norris Trail amongst saguaro cactus, late afternoon. Saguaro National Park, Arizona, USA. http://www.terragalleria.com/parks/np-image.sagu32848.html Family walking on forest trail. Olympic National Park, Washington, USA. http://www.terragalleria.com/parks/np-image.olym30153.html Backpacker on trail towards Round Top. Mokelumne Wilderness, Eldorado National Forest, California, USA http://www.terragalleria.com/california/picture.usca9787.html Hiking down Hugh Norris Trail amongst saguaro cactus. Saguaro National Park, Arizona, USA. http://www.terragalleria.com/parks/np-image.sagu32845.html