I thought this was the most interesting part of the Three Sisters Wilderness. There were tons of this volcanic glass. The third picture is a closeup of the obsidian on the right side of waterfall on the fourth picture.
Adventures & Explorations:
-Attempted to make the first descent of the Victoria Nile River
-Twice attempted to make the first kayak crossing of South America
-Made a 1977 alpine style attempt on Everest without Sherpas
-Put up 3 new routes on Devil's Tower, El Cracko Diablo being a Tower classic
-Climbed the Nose on El Capitan
-Climbed the NW face of Half Dome
-Climbed Mt. McKinley by the West Rib and the West Buttress
-Climbed Kilimanjaro twice, the first ascent being a one day ascent
-Retraced the 1000 mile Powell Expedition down the Green & Colorado Rivers including the Grand Canyon by dory
-2 kayak descents of the Grand Canyon
-Descent of the Li River in China
-Ascent of Mt. Pacharmo in Nepal
-Mt. Katahdin ascent
-Trekking in New Zealand, Australia, Haute Route, JMT, Wonderland Trail, Nepal and Patagonia.