Classic WoW Mining Farming Locations
This page will give you the three best locations for you to use your Mining profession in Classic WoW. If you're wondering why Azshara and Winterspring aren't included it is because Un'goro and Burning Steppes are better than both places for farming mines. Also since farming for Thorium isn't as popular as it used to be you can go to one of the better zones without having to worry about competition!
Badlands Mithril Farming
Badlands is probably the best zone around to farm for Mithril in. Here you will find tons of it scattered around the rocky land scape and deep within the ogre caves. Many people don't know the value of Mithril and often over look its prices in the Auction House. On my server Mithril can go for up to 60g a stack! This is definately an easy money maker for lower level players with Mining.
Also while farming for Mithril in the Badlands you will also find quite a bit of Iron which sells on the Auction House for generally a gold or two a bar. In otherwords, mine everything you come across for maximum profit!
Thorium Farming in Burning Steppes
Burning Steppes is probably the best old school location when it comes to mining. Here you will find tons of Thorium scattered all around the zone. Also the zone is really easy to form a good solid path in. I usually scout the northern part of the zone, hit up the ogre caves to the east and then scout the bottom part of the zone. The only annoying and bad part you can say about following this farming path is having to unmount to enter the ogre caves. But they are a nice additional form of Runecloth which will add to how much money you make here.
Out of all the zones listed on this page Burning Steppes is the most likely of them you will find another player farming at the same time. This zone can hold two people but I don't advise it because your money will be halved, literally.
Additional Note: You will also find a bit of Dark Iron and Mithril here. The Mithril will sell well on the Auction House but the Dark Iron will be harder to get rid of since you will need someone working on their Thorium Brotherhood reputation and on the Dark Iron ore part.
Thorium Farming in Un'goro
Un'goro Crater is one of the best locations to mine Rich Thorium and Thorium. All around the mountain-ey edges of Un'goro you have a chance to find either a Small Thorium Deposit or Rich Thorium Deposit. The only other place in the whole zone they can be found except for around the outside is a few in Terror Ridge and a few in Fire Plume Ridge.
Un'goro Craters mining path is pretty simple thats why I don't have a video posted here for it. Really you can run clockwise or counter clockwise around the zone and still get the same amount of Thorium. On average here you should expect to pull in at least 5 stacks an hour if not more. Also don't forget the pretty green gems!