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  • A full moon rises over silhouetted trees in Colorado State Forest State Park, Colorado.
    110319_0709.JPG
  • Katy Barnhart puts on sunscreen inside the Lower Montgomery Pass Yurt in Colorado State Forest State Park, Colorado.
    110319_0602.JPG
  • Skis at night outside the glowing Lower Montgomery Pass Yurt in Colorado State Forest State Park, Colorado.
    110318_0354.JPG
  • Environmental Studies graduate student Alex Lee at Varsity Lake in winter after a snow storm, University of Colorado campus, Boulder, Colorado.
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  • Varsity Lake in winter, University of Colorado campus, Boulder, Colorado.
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  • Brick bridge across Varsity Lake in winter, University of Colorado campus, Boulder, Colorado.
    110000_r0002_07.JPG
  • Varsity Lake in winter, University of Colorado campus, Boulder, Colorado.
    110000_r0002_02.JPG
  • Red brick wall, University of Colorado, Boulder, Colorado.
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  • A sprinkler sprays water against trees on the University of Colorado campus in Boulder, Colorado.
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  • A sprinkler sprays water against trees on the University of Colorado campus in Boulder, Colorado.
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  • Multiple exposure of a tall cottonwood (Populus sp.) tree covered in snow on the University of Colorado campus in Boulder, Colorado.
    110000_r0001_42.JPG
  • A sprinkler sprays water against trees on the University of Colorado campus in Boulder, Colorado.
    090928_5899.JPG
  • A student walks past garbage cans on the University of Colorado campus, Boulder, Colorado.
    110000_r5000_14.JPG
  • Multiple exposure of Varsity Lake, on the University of Colorado campus, in winter in Boulder, Colorado.
    110000_r0001_45.JPG
  • Multiple exposure panorama of the University of Colorado campus covered in snow in Boulder, Colorado.
    110000_r0001_43_pan_crop2.JPG
  • Multiple exposure panorama of Varsity Lake, on the University of Colorado campus, in winter in Boulder, Colorado.
    110000_r0001_43_pan_crop.JPG
  • Multiple exposure panorama of Old Main and the University of Colorado campus covered in snow in Boulder, Colorado.
    110000_r0001_39_pan.JPG
  • Sunset over the Never Summer Range of Colorado (Baker Mountain and Mount Stratus), as seen from Baker Gulch, Never Summer Wilderness, Colorado.
    100606_9707.JPG
  • A student observes satellite data of the Earth (mean sea surface temperature) projected onto a sphere at the Fiske Planetarium at the University of Colorado campus in Boulder, Colorado.
    091130_7196_alt.JPG
  • NASA Chief Scientist Waleed Abdalati projects satellite imagery of the Earth onto a sphere for students at the Fiske Planetarium at the University of Colorado campus in Boulder, Colorado.
    091130_7183.JPG
  • Multiple exposure of Varsity Lake, on the University of Colorado campus, in winter in Boulder, Colorado.
    110000_r0001_44.JPG
  • Kelsey Cody, runner and environmental studies graduate student at the University of Colorado, on Mount Sanitas in Boulder, Colorado.
    100410_0257.JPG
  • A student observes satellite data of the Earth (mean sea surface temperature) projected onto a sphere at the Fiske Planetarium at the University of Colorado campus in Boulder, Colorado.
    091130_7193_alt.JPG
  • Kelsey Cody, runner and environmental studies graduate student at the University of Colorado, on Mount Sanitas in Boulder, Colorado.
    100410_0221.JPG
  • University of Colorado geology graduate student Francis Rengers installs a LiDAR laser scanning target for his research studying stream erosion at the Plains Conservation Center boundary near Strasburg, Colorado.
    111128_2048.JPG
  • Daan Stevenson does a backflip off of a jump during a ski tour with the University of Colorado Backcountry Club to Jenny Lind Gulch, Arapaho National Forest, Colorado.
    110123_9658.JPG
  • David Coffey (l-r) and Marco Binotti watch the solar eclipse on May 20, 2012 near Pine, Colorado.
    120520_3443.JPG
  • James Meldrum studies a topo map on the summit of Longs Peak, Rocky Mountain National Park, Colorado. Chiefs Head is visible in the background.
    110719_9259.JPG
  • Mountain views from Longs Peak (looking NNW), Rocky Mountain National Park, Colorado.
    110719_9161.JPG
  • View of Front Range July 4th fireworks displays from the Flatirons above Boulder, Colorado.
    110704_8228.JPG
  • A male yellow warbler (Setophaga petechia) lies dead on the side of a road near Crested Butte, Colorado.
    110621_7522.JPG
  • Granite rock formations in mist above McMurdy Park, Lost Creek Wilderness, Colorado.
    120519_2663.JPG
  • City street covered in snow in Boulder, Colorado.
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  • A group of hikers on the trail to Mount Sanitas in Boulder, Colorado.
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  • Backcountry skiers take a break on a jeep road lined with aspen trees in Uncompahgre National Forest, Colorado.
    110324_0974.JPG
  • Backcountry skiers Sarah Conlin, Meaghan Daly and Emily Miller battle fierce wind and blowing snow in Uncompahgre National Forest, Colorado.
    110324_0935.JPG
  • View over Boulder, University of Colorado and the coal-powered Valmont Power Plant from Chautauqua Park, Boulder, Colorado.
    110108_9568.JPG
  • Crowds of spectators at Conor O'Neill's pub in Boulder, Colorado jump for joy as Clint Dempsey scores a goal for the US during the World Cup soccer match between England and the USA on June 12, 2010. The match ended in a 1-1 tie.
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  • Young men float down Boulder Creek in inner tubes on a hot summer day in Boulder, Colorado.
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  • Bathers and dogs go for a dip in Boulder Creek at Eben G. Fine Park on a hot summer day in Boulder, Colorado.
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  • Alessandro Lauria, 12, rushes through a jet of water running in the 2012 Bolder Boulder 10K road race in Boulder, Colorado.
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  • Savannah Thaler, 6, rushes through bubbles running in the 2012 Bolder Boulder 10K road race in Boulder, Colorado.
    120529_4179.JPG
  • A woman competes with a flower in her hair in the 2012 Bolder Boulder 10K road race in Boulder, Colorado.
    120529_4010.JPG
  • Teenage girls tumble through a Slip 'n Slide at the 2012 Bolder Boulder 10K road race in Boulder, Colorado.
    120529_3820.JPG
  • Marco Binotti watches the solar eclipse through three pairs of sunglasses on May 20, 2012 near Pine, Colorado.
    120520_3453.JPG
  • Glaciologist, author, and photographer William Tad Pfeffer near his home in Nederland, Colorado.
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  • View of the canyon and the Gunnison River from Island Peaks, Black Canyon of the Gunnison National Park, Colorado.
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  • A dead snag on the canyon rim at Island Peaks, Black Canyon of the Gunnison National Park, Colorado.
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  • Backlit detail of canyon wall, Black Canyon of the Gunnison National Park, Colorado.
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  • Obadiah Reid takes pictures from Island Peak at sunset in Black Canyon of the Gunnison National Park, Colorado.
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  • Obadiah Reid looks out towards The Narrows from Island Peaks at sunset in Black Canyon of the Gunnison National Park, Colorado.
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  • Obadiah Reid enjoys the views from Island Peaks at sunset in Black Canyon of the Gunnison National Park, Colorado.
    120428_0565.JPG
  • A man photographs himself at the Island Peaks View overlook in Black Canyon of the Gunnison National Park, Colorado.
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  • Island Peaks from the North Rim, Black Canyon of the Gunnison National Park, Colorado.
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  • Island Peaks from Big Island View, Black Canyon of the Gunnison National Park, Colorado.
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  • A parked car at night in a parking area at Eldorado Canyon State Park, Colorado.
    120410_0466_pan.JPG
  • A climber at night on a rock route in Eldorado Canyon State Park, Colorado.
    120410_0438.JPG
  • A young man rock climbs in Clear Creek Canyon, Colorado.
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  • Two climbers on the The Bastille, Eldorado Canyon State Park, Colorado.
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  • Trees on a narrow rock ridge in Eldorado Canyon State Park, Colorado.
    120317_0439_pan.JPG
  • Obadiah Reid lead climbs the final pitch of Icarus (5.6) on Redgarden Wall, Eldorado Canyon State Park, Colorado.
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  • Obadiah Reid lead climbs the first pitch of Icarus (5.6) on Redgarden Wall, Eldorado Canyon State Park, Colorado.
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  • Nathan Kurz on the approach to Chasm Lake, Rocky Mountain National Park, Colorado.
    120316_9656.JPG
  • Obadiah Reid takes pictures on the summit of Twin Sisters Mountain at sunrise in Rocky Mountain National Park, Colorado. The rolling hills of the Front Range extend behind him towards the plains.
    120310_9479.JPG
  • Moon over Longs Peak at sunrise, Rocky Mountain National Park, Colorado.
    120310_9472.JPG
  • The rocky summit of Twin Sisters Mountain at dawn in Rocky Mountain National Park, Colorado.
    120310_9436.JPG
  • Obadiah Reid on the summit of Twin Sisters Mountain at dawn in Rocky Mountain National Park, Colorado. The moon is setting over Longs Peak behind him.
    120310_9415.JPG
  • Friends play cards at Francie's Hut, a backcountry cabin in Arapaho National Forest, Colorado.
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  • David Coffey and Obadiah Reid stand by a waterfall on a hike down Big Thompson River, Rocky Mountain National Park, Colorado.
    111016_1790.JPG
  • David Coffey carefully balances across logs in Big Thompson River, Rocky Mountain National Park, Colorado.
    111016_1395.JPG
  • Fern Lake Trail winds through a golden aspen (Populus tremuloides) grove in Rocky Mountain National Park, Colorado.
    111016_1216.JPG
  • Gnarled pine on Longs Peak, Rocky Mountain National Park, Colorado.
    110719_9332.JPG
  • James Meldrum scrambles the Homestretch to the summit of Longs Peak, Rocky Mountain National Park, Colorado.
    110719_9214.JPG
  • McHenrys Peak at sunrise, from Longs Peak, Rocky Mountain National Park, Colorado.
    110719_9155.JPG
  • James Meldrum takes in breathtaking views from the Keyhole on Longs Peak, Rocky Mountain National Park, Colorado.
    110719_9118_pan.JPG
  • James Meldrum in the Boulder Field below Longs Peak at sunrise, Rocky Mountain National Park, Colorado.
    110719_9069.JPG
  • The Keyhole and Agnes Vaille Memorial Hut on Longs Peak, Rocky Mountain National Park, Colorado.
    110719_9057.JPG
  • James Meldrum hikes up the Boulder Field below Longs Peak at sunrise, Rocky Mountain National Park, Colorado.
    110719_9042.JPG
  • Activists plant a garden patch of sunflowers in front of the coal-fired Valmont Power Plant in Boulder, Colorado to protest its continued operation. The all-ages group reached the site by riding bicycles from downtown.
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  • Sunflowers placed in front of the coal-fired Valmont Power Plant in Boulder, Colorado to protest its continued operation.
    110716_8801.JPG
  • A group of all ages rides bicycles from downtown Boulder, Colorado to the nearby coal-fired Valmont Power Plant to protest its continued operation. The activists planted sunflowers and erected signs on vacant land outside the entrance to the station.
    110716_8674.JPG
  • A group of all ages rides bicycles from downtown Boulder, Colorado to the nearby coal-fired Valmont Power Plant to protest its continued operation. The activists planted sunflowers and erected signs on vacant land outside the entrance to the station.
    110716_8635_crop.JPG
  • A group of all ages rides bicycles from downtown Boulder, Colorado to the nearby coal-fired Valmont Power Plant to protest its continued operation. The activists planted sunflowers and erected signs on vacant land outside the entrance to the station.
    110716_8600.JPG
  • A man dressed as a clown addresses a group of activists preparing to ride bicycles from downtown Boulder, Colorado to the nearby coal-fired Valmont Power Plant to protest its continued operation. The protesters planted sunflowers and erected signs on vacant land outside the entrance to the plant.
    110716_8392.JPG
  • View of the Boulder, Colorado July 4th fireworks display from the top of the Flatirons.
    110704_8234.JPG
  • Obadiah Reid climbs the First Flatiron at night above Boulder, Colorado.
    110704_8118.JPG
  • Grace Marx climbs Fandango (5.5) on the First Flatiron in Boulder, Colorado.
    110704_8039.JPG
  • Trees silhouetted against steep valley walls in Rocky Mountain National Park, Colorado.
    110703_7955.JPG
  • A young woman wears the tail of a dinosaur pinata as a hat in a front yard in Boulder, Colorado.
    110702_7697.JPG
  • Jake Welch stares crazily at the camera in his front yard in Boulder, Colorado.
    110702_7632.JPG
  • A crowd gathers for Film on the Rocks at the Red Rocks Amphitheater near Morrison, Colorado.
    110628_7551.JPG
  • Nathan Rice holds a dead male yellow warbler (Setophaga petechia) in his hand. The bird was found dead on the side of a road near Crested Butte, Colorado.
    110621_7543.JPG
  • Nathan Rice holds a dead male yellow warbler (Setophaga petechia) in his hand. The bird was found dead on the side of a road near Crested Butte, Colorado.
    110621_7527.JPG
  • Croplands and terraces in the North Fork Valley near Hotchkiss, Colorado.
    110620_7338.JPG
  • A rainbow and storm clouds over the North Fork Valley near Hotchkiss, Colorado. Mount Lamborn and Landsend Peak (l-r) rise prominently across the valley.
    110620_7314.JPG
  • Ethan Welty belays Obadiah Reid on the summit of the First Flatiron above Boulder, Colorado, rising above the mist.
    110514_3215_pan_crop.JPG
  • Obadiah Reid belays the photographer up the summit ridge of the First Flatiron (Direct East Face, 5.6) above Boulder, Colorado.
    110514_3188.JPG
  • Obadiah Reid belays the photographer to a tree on a climb of the First Flatiron (Direct East Face, 5.6) above Boulder, Colorado.
    110514_3043.JPG
  • Patio tables and chairs covered in snow, Boulder, Colorado.
    110000_r5000_22.JPG
  • Passengers catch the Hop at a bus stop on Canyon Street in winter in Boulder, Colorado.
    110000_r5000_06.JPG
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