This Month in Photo of the Day: Adventure and Exploration Photos

Arrigetch Peaks, August 23, 2010
"These teeter-tottering granite boulders all wanted to slide," Andrew Skurka says of a talus-covered pass in the central Brooks Range, where his friend Roman Dial joined him.

See more pictures from the March 2011 feature story "Circling Alaska in 176 Days."

Learn more about National Geographic explorers in the field »
See more pictures of National Geographic explorations »