The SGC - SGC Wallpaper
Come check out our wallpaper section! :-)

SCIFI.COM | Stargate SG-1 - Downloads - Desktops
Some really cool papers provided by

SCIFI.COM | Stargate Atlantis - Downloads - Desktop Wallpapers
Some really cool papers provided by

Cheyenne Mountain Stargate SG-1 Wallpaper
Some great ones here by Katana.

SG-1.CO.UK - 3D Art
Some really good 3D-quality ones here.

Dedicated To Stargate SG-1 - Wallpapers/Art
Lots of great stuff here by several artists.
Go to 'Wallpapers' in the menu. - Wallpapers
A lot of these aren't quite 800x600, but they're still really good!

Bri's Stargate SG-1 Wallpapers
She has a TON. Seriously. And they're all really good.

Wild Horses - Media
Some very beautiful wallpapers here, by various artists.

Abydos Gate :: Download
Wallpapers are first on the list. Pick a character or season.

Moon-Catchin.Net - Stargate Wallpapers by Celsitude
Lots of beautiful landscape shots of offworld gates, plus others.