Took all of these at our local dirt jump trails, here in Cary, NC. And here's a few from a skate park competition: Skate park shots were taken with a rented Canon 70-200 f2.8 IS, Dirt jump shots taken with the kit 18-55 lens.
The last couple look like BMX to me! (I ride as much as I can) Great shots though and a nice looking set of trails.