Many in the middle of the night, most I checked into carefully started near a road, whether big road or forest service. Info from Inciweb.
Major non-lightning fires
OR/with one Idaho Fires
Sweet Creek MP 2 Human Aug.30
Two Four Two Unknown Sept 7
Brattain Fire - Human Sept 7
Holiday Farm Fire Unknown Sept 7
Echo Mountain Complex Fire - Unknown Sept 7
Wood head - Unknown, Under Investigation Sept 7
Idaho: Woodhead Human Under Investigation Sept 7
Slater/Devil Fire - Under Investigation Sept 8
South Obenchain - Under Investigation Sept 8
Riverside Human Sept 8
Alameda Fire Under Investigation (News said arson) Sept 8
Archie Creek- Under Investigation Sept 9
WA Fires
Evans Canyon Unknown Aug 31
Cold Springs Under Investigation Sept 6
Babb-Malden/Manning Fires Unknown Sept 7
Inchelium Complex Under Investigation Sept 7
Apple Acres Fire Under Investigation Sept 7
Pearl Hill Fire Under Investigation Sept 7
Big Hollow Unknown Sept 8