I had a dream that everything was just completely dark. That I was just running and running, but couldn't see anything. It was extremely cold. All I remember is running up hill. When I got to the top, the sun was hidden behind the mountain, but I tripped and fell all the way back down the hill. That's all I can remember.
This reminded me of the Greek mythology story of the man in Hades, who had to push a rock up the hill, and when he almost reached the top, the rock rolled back down to the bottom. Maybe you are struggling with something- a goal, task, assignment, and can't seem to find out how to "get over the hump."
The darkness might represent some anxiety that you are feeling at the moment. You might be scared of failure, which is why you fell down the hill. Or maybe you're feeling alone. I think you need to figure out how to overcome what is influencing this dream. Sitting down and making a list of things to accomplish always helps me.
The darkness represents confusion. maybe about the environment you are placed in, possibly the new environment of college (if you're a first year). climbing to the top and seeing the sun may represent an understanding of this new environment, but you fall back down, as you feel that you still have a lot to learn