What's your lowest score ever?

My lowest 18 was a two under 70 at Fallbrook Golf Club in California about 2001.  I worked all night and went straight to the course after work.  I must have been very relaxed because the round had none of my usual mental antics that get in the way.  Lowest for 9 was four under on the back 9 at Barona near San Diego.

Lowest 9 hole round is 33, lowest 18 is even par 72