Steep slopes require you to climb. To climb a surface, click on the '''Climb''' button in your Event window. If you carry a lot of items, your stamina will drop like a stone while climbing, and fairly fast while walking. And you can not climb trees, sorry.
The [[Compass]] is one of your most important tools for getting around Wurm. Too see your [[compass|Compass]], make sure it is in your inventory, look at your feet and you will see it in your hand. You should also know where the [[WhiteLight]] is at all times. It is a good point of reference when trying to find your way. Currently, the [[WhiteLight]] is only in the [[Wild Server]]. Last, but not least, you can look at a [[token|Token]] to see a wind rose.
Note that when your green stamina bar goes down to nothing, your speed while walking will slow dramatically, and that if you are climbing and it drops to less than about half way, you will stop climbing and may fall.