After the Mining & Smithing rework, runite ore never runs out when mining it.
Using the superior locator, a reward from Mobilising Armies, players can teleport to one of five runite mines across RuneScape. Players should be aware that two out of the five possible locations are within the Wilderness, and the player may encounter player killers (PKers); no warning will be given upon activation of the locator.
An alternative to the Wilderness is the Mining guildresource dungeon. This mine is more popular because it is much more safe, and as such it can be very hard to find a rock that hasn't already been mined. The release of this mining site more than doubled the number of non-member runite rocks; the following oversupply of ores significantly deflated the price of Runite ore.