There is a certain level needed to get on the highscores in any skill or game, this shows the current levels, the normal is level 30 (in the case of games, some different scores), but once a million people get up on the highscores, that changes, going a lot higher. In the case of some of the more trained skills, quite high.
This lise will show you what levels you will need to get onto the highscores, good luck!
This list is automatically updated every 24 hours, but if you wish, you can update it yourself, although that is only possible at most once an hour because of the high strain it puts on the Runescape servers.