You can run southwards too. It even tells you when you reach the top that you've started another run. Hunter - I've had the same issue and apparently some areas are glitched. Try running in another spot. I've been basically running up and down in line with the Black Knight's Fortress and it's always failed going south. Someone told me to try running up and down in line with the spirit tree in the GE, that worked for them. I've yet to try another spot yet but I will do shortly. EDIT: Actually, I just tried a run up and back. I started in line with the spirit tree in the GE as mentioned. On my way back I arrived a little east of that point, but my run back counted.