Platypus Platy Sport Water Bottle - 0.7 oz.* (?)
Platypus Big Zip SL 2L Hydration Bladder 70 oz. - 4oz.* (?)
Above : you've listed TWO water bottles? What for? Just take the two liter version (is it hoze version? You can leave the hoze behind too)
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12in*12in Microfiber towel - 2oz. - - - A towel AND a bandana? You don't need both.
1.5 fl.oz. Sunscreen - 2.1 oz. - - - TOO much, repackage in a smaller bottle. You have long pants.
Katadyn Hiker Filter - 11 oz.* - - - Use a chemical treatment like AQUA-MIRA, and save a LOT. You are in Northern Idaho, right? That's the cleanest water in the world!
Cottage Cheese Bowl - 0.5 oz. - - - A bowl AND a pot? Eat out of the pot. Nix the bowl.
Fleece Pullover - 14oz. - - - Fleece is heavier than a PUFFY jacket. Invest in a puffy DOWN jacket.
Slumberjack 20F Bag - 49 oz. - - - A THREE pound sleeping bag for summer? You should invest in a 40 degree down bag, and save a LOT of weight.
Homemade Tyvek bivy w/no zipper - 4 oz.?* - - - Why a take a bivy if the weather is clear? What purpose is it serving? Have you tried this? It may be really clammy and soak your sleeping bag.
TP:(10) 4in*4in Blue Shop Towels - 1oz - - - The toilet paper is NOT a necessity, you can easily leave it behind. (really)
Trash Bag - 1 oz - - - A trash bag should NOT weigh one once, Just use an empty food bag after the first meal.
Lightweight Hiking Boots - - - Go with sneakers!!! That the whole reason to have a light pack - to ditch the booots!
Emergency Poncho 20z - - - What emergency will it solve? I don't know what purpose it'll serve? If you are going without a shelter - go without a shelter!
No warm hat?
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The two biggies are the sleeping bag and the Water filter. Next is the fleece pullover. Revise these biggies and you'll be stylin'
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Just so you know, I go out without a shelter ALL the time in the summer, in idaho! I love the freedom. I figure, the worst that happens is I walk until the rain stops. It's never happened (Knock wood).