While there's quite a few bits and pieces hidden away in Victoria Park, with this one they go a bit further: there's no paths leading to it at all. It's adjoining Grove Road where it goes through the park, and on the park side it's bounded by open grass.
It's not massive, but contains a few lowish metal ramps and some railings for tricks. I don't actually do the sports myself so can't really comment, but it looks a little square and restricted to me. Still, the ramps do look in good condition, and it's not overly crowded.
Incidentally this park is currently appearing on one of the little joke sponsor messages during the current series of Big Brother (other locations around Victoria Park also appear), so you if you watch that, look out for it!