I am really a big fan of these two sites. Both offer great gear at great prices.

Here is a site that has a ton of great info!

Here are some more great sites!

www.backpackthesierra.com

www.slackpacker.com

www.kevingong.com/Hiking/index.html

www.peaktopeak.net/ca.html

Leave no trace site

National forest list in CA

National Wilderness Map and info