I had a vaguely similar situation where I did not get stopped, or get a ticket. The limit was 60, and I caught up with a string going about 52 - 55 (hard to tell, everyone was yo-yo'ing from the rig ahed of them) Anyway, at night, a LONG (miles) s traight stretch with no oncoming traffic, I pulled out to pass 2 or 3, and lo and behold when I get there, there's nowhere to go... so I kept it nailed to the floor and ended up going around 5 or 6 cars and a semi. Abouth halfway through it, a pair of lights appeared in the distance. Only the semi was following at a decent distance from the vehicle in front, but at 100 MPH, I had to brake REAL hard to get into the space. I swear there wasn't a length of my truck between a couple of them, and the guy following the semi. Why nobody else passed, I don't know. There was lots of opportunities before I caught up with the string.
I'm sure a county mounty or state trooper would have been having a screaming fit to catch me on radar at 90-100 mph, but like you, once I pulled out, the gap I left closed and there was nowhere in front, either. What appeared to be a large space ended up being a small car between two 1 tons pulling horse trailers.
WAshington state specifically has it written into law that you may exceed the speed limit to pass someone. I believe Oregon does too.