Are all outdoor tracks 400 meters?

Question

Or are they all different sizes? I know some indoor tracks are 200 because I have a race tomarrow and I want to prepare for it.

Answer 1

All outdoor tracks used for meets are 400m with two 100m straights and 2 100m curves. outdoor tracks may be different lengths, but you cannot have a meet at those tracks.

Answer 2

The older tracks were 440 yards and some must still be in use.   They have been remarked for finish lines in meters, though, which is not difficult.