Do you see the Snowshoe Thompson Memorial on the map above? In the 1850's he was a mail carrier in El Dorado County, CA. He was known for crossing the Sierra's on skis in the worst weather to deliver the mail, and in the process saving a number of lives. He did this all without a GPS, or radio, or modern first aid kits, or even Starbucks ! You will find wisdom and timeless lessons from Snowshoe Thompson in many SAR books even today.
For more information about the history of the El Dorado SAR team go to - http://www.comspark.com/esarc/history.htm