Where is the best place to mine coal on runescape?

Go to the east part of falador, then there is like 4-6 houses collected in a ring, in the middle are there some ladders.

Go down the ladders there should it be lots of coal, mithril and adamant.

PS!

You need at least level 60 mining to enter.

(Then if you haven't level 60 mining you can use different places like edvillage dungeon.)

You could also go to the dwarven mine, where there are a few coal rocks next to the entrance of the mining guild - however there a few king scorpions which may attack low leveled miners.

If you have a dungeoneering level of 15 or more you could also go to the dungeoneering entrance, where there are a lot of coal rocks at the back of the cave and a bank deposit box near the entrance.