Evolution Loop

Recommended Reading:

Backcountry Skiing California's High Sierra
by John Moynier

Available at The Back Country
BACKCOUNTRY SKIING: Skills for Ski Touring and Ski Mountaineering
by Martin Volken, Scott Shell and Margaret Wheeler

Available at The Back Country.
Links:

The Back Country:   www.thebackcountry.net
Wild Snow:   www.wildsnow.com
K2:   www.k2ski.com
Garmont:   www.garmont.com
Ortovox:   www.ortovox.com
Patagonia:   www.patagonia.com
Mammut:   www.mammut.com