Check the sticky post by "phat" at the beginning of the "Backcountry Beginners" section on this forum. It has useful links to several backpacking gear lists.

Two of these lists are on the home page of this site, along with much other useful information.

My own gear list is modeled after the 27-pound, 7 day pack list. Not exactly the same items, but similar in weight, aiming for about 15 lbs base weight (everything except fuel, food, water--in other words, the items that go on every trip regardless of length). I managed to pare my list down to 12 1/2 lbs. base weight.
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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey