Any small municipal or private airport I have been to will sell you av gas. Some would even pump it directly into the car on the tarmac. Although many today will only pump it into an approved gas can. In other words one that was made for gas and has all of the federal balogna written on it. You can't just go there with an old water can an expect to get it filled.
No, we can't buy racing fuel at the pumps.
But there are things about California that I wouldn't trade for anything else...
There use to be a place, I'm not sure if it is even still there in San Leandro Ca. {SF Bay Area}, ERC Racing Fuels {Engine Research Company}, that had 3 pumps with up to105- 116 octane race gas, last time I was there was in the early 90's... Were I live 91 oct. unleaded is the best with out going for racing fuels at the source in Sacramento or Modesto Ca. both many miles & 1-1/2 hr+ drive away... There is the little Columbia Muni. Air Port, they have 105-108 Av-gas with a bunch of additives in it, but wont pump into a car... We do have enormous govt. debt, beautiful warm sunshine & mostly great weather, beautiful beaches & many beautiful women though...LOL...
Hey Bud it was TRICK racing gas in San Lorenzo I knew it well Since I lived in San Leandro.
They had one station that had, I think 101-112 I remember getting 110 for $2.25 a gallon :O
They are still around apparently in Oakdale as far as an address only.
http://www.trickgas.com/
Well looks like we are wrong, I was just told there is a 110 pump at a quick stop in Manteca,ca
Corner of Yosemite and airport