New guy here and also a family ATVer. Two Sportsman 500s and two Honda Recons, we spend most of our ride time in Oregon, as already mentioned the Peoples Republic of Washington makes riding here near impossible. We've ridden all over in Oregon; heavily in NE Oregon, but down to the Oregon Dunes (annual trip) and down to SE Oregon to ride the Alvord Desert. We also took a great two week trip in 2007 to Southern Utah, rode Sand Hallow, Coral Pink Dunes, around Bryce Canyon and the Paiute trail.
First pic is at the Alvord Desert looking West at the Steen Mountains, other pic is me trying to make a Utility ATV fly a bit.