Parts of NE WA are sort of a wilderness haven in a huge populated (Pugetropolis) urban state. Most Seattle & urban WA residents don't have clue how remote & wild parts of NE WA are.
As for Crab Creek in Lincoln County, WA - Hardings Rd & Rt 23, spent many hours there shooting rockchucks - alfalfa & talus slopes. Tiny little rainbow trouts & other small fishes in Crab Creek. Lots of rattle snakes near marshy wet areas.
The channeled scablands around Sprague WA are a result of a series of huge floods caused by failure(s) of a 2000-foot-high ice dam located between Clark Fork ID & Noxon MT, that backed up Lake Missoula, 13,000 to 15,000 years ago. Huge blasts of water gushed down from the ancient Lake Missoula thru N Idaho pan handle then just north of Spokane then to the Sprague WA area then SW to Colombia River. The channeled scablands consist of many pothole like features some 50 to 200 yards wide having basalt rims with steep slopes. Viewing this area from a distance it appears to flat but when crossing on foot the potholes appear & make for a circuitous route. Lots of hidden wildlife like deers & coyotes down in the potholes (basins). Not good farmland for growing wheat.