Water from the southern slopes goes to the same place .
Water from the southern slopes progresses by Glen Orchy and Loch Awe while the eastern slopes drain via Loch Rannoch and the River Tay to the east coast at the Firth of Tay .
Water from the southern slopes goes to the same place but progresses by Glen Orchy and Loch Awe while the eastern slopes drain via Loch Rannoch and the River Tay to the east coast at the Firth of Tay .