Is it even possible to get 100 octane gas anywhere near northern virginia? I have been searching for a while but haven't found any info on it.

I drove up to State College, Pa for the football game this weekend. When I was up there I stopped in somewhere for gas. All the guys in the garage came out and asked if they could look at the CS. They said they all worked on a racing team and loved the car. So I asked them if they knew how to find 100 octane gas. They all said that people around there went to the airport for it. Now I am a pilot and I know that any airport has avgas which is either 100 or 110 octane and usually about a dollar more per gallon then premium gas but its low leaded fuel. I would never put leaded gas into my car but several of them said that thats where they got thier race gas from...?!?