This mod by eutirion allows you to skate anywhere through the game world, and quite quickly too, making it a lot easier to travel around. There's also changes to things like combat speed and water traversal as a result, but weather this is intentional or simply a side effect, I'm not sure.
But it's not too important either, because with this mod enabled all you're going to want to do is skate around and attempt to pull off tricks and stunts. It's a great way to have some fun in the game in a not too serious way, and can even allow you to glitch your way to places you may not normally be able to see.
You can download the mod now from NexusMods.