Strong trees are large plants that are used for shortcuts. A mithril grapple and a normal crossbow or better (including karil's crossbow) are required to latch on to them. The strong yew in the lumbridge swamp was replaced with a strong tree on 15 February 2011.
- Eastern shore of Lumbridge Swamp - Western shore of Al Kharid (usable both ways)
- Catherby beach, adjacent to Water Obelisk Island (usable only from the obelisk side to the Catherby side)
- Karamja (usable both ways)
- If you try to grapple the strong tree in Catherby a message pops up saying "You cannot see a good spot to grapple the rock" even though you are trying to grapple the tree.
- With the addition of the bridge next to the Al-Kharid shortcut, this shortcut has become somewhat useless, except for the xp earned from building the hidey-hole.
- Unlike other trees, strong trees may not be cut. Strangely, some of the strong trees are smaller than their cuttable counterparts.