Wow! I've never heard of anyone needing an alarm clock on the trail. As others have noted, I go to bed early because it's dark...and I am usually up about dawn. I am sure my wife would love to trade me in for a longer sleeping model...but she knows she can't get much at the dealer for me!
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Check our our website: http://www.backpackthesierra.com/

Or just read a good mystery novel set in the Sierra; https://www.amazon.com/Danger-Falling-Rocks-Paul-Wagner/dp/0984884963