1996 Mazda MX6 Oil leak

As I drove home this evening I smelled oil burning, no lights came on and car was not overheating. I opened the hood of my car and it was smoking. I checked water levels and oil level - everything was fine. I went out to check again about 1/2 hour later and started the car to check it for overheating.

Then I looked under my car and there was about 1/4 cup of oil that had poured out of my car. I moved it to the street and it left a small streak of leakage along the driveway. I checked it again about an hour later and there was just a small pool of oil under the car. I didn't check oil level again because it was dark outside.

What do you think it could be? When I looked closely at the engine, it looked like oil was spilled up high in the engine, about same level as oil filter - but not coming from oil filter.