THE DRY SHRUBLAND of Colorado's Front Range foothills encourages a certain downward concentration. Rattlesnakes curl under mountain mahogany. Jagged rocks could break an ankle. I've run and hiked these trails for 30 years, and sometimes I watch so closely for hazards on the ground that I miss subtle changes in the landscape-the varying shades of green after spring rains and summer monsoons, the birdsong shifts of avian migration, the cumulus clouds of morning transforming into cumulonimbus thunder-heads by afternoon. Maybe these spaces have become too familiar. Maybe I take them for granted.
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