My wife and I took a spur of the moment weekend trip to Reno (from Seattle) a couple years ago in October, as we weaved out of the Northern California Sierra Nevada - Mt Shasta mountains, driving south toward Reno about an hour after dusk, I pushed the local AM buttons on the car radio and both KIRO and KOMO came in. Was fun listening to the early evening traffic reports from Seattle.
On a related note, back in the late 80's a friend and myself where driving eastbound on I-8 in the southern California desert toward Yuma, Az. We listened to the full service AC format of KOMO like a local.