Do you drive it much? If not you may want to have the system flushed and refilled and properly bled.
Did it manifest while moving slow or with the car stopped? If so did the fans go off? If it's the case and the fans did not start either let it rest for a day or so and try it again to see if they go off and if it happens again and the fans don't start you should have your electrics checked.
If it happened with the car moving at proper speeds, your fans don't make a difference and then you could have a leak (your water level should go down) or a faulty radiator or even a gasket issue but I think in the last case your oil may look creamy as Gcalo mentions.
I had an overheat issue with the car stopped and it went away as it came, without intervention. For some unknown reason the fans just didn't go off once.
... racing, it's life. Anything that happens before or after is just waiting... (Steve McQueen / Le Mans)