I used to hunt Umtanum canyon a lot down Durr road, but it's been a few years since I've been down in there. I was there about a month ago in a smaller "city" SUV with regular tires. I was surprised at how bad the ruts were and turned around down at the first hairpin. I encountered some guys on quads on the way down and they had just been down there. They said it was fine for high clearance rigs but the road on the west side of the creek heading uphill was kind of dicey. Have fun. By the way, most of the land east of Durr Road appears to have suffered badly in the fires this past year. There doesn't appear to be much cover for birds.