Loch Lomond Scotland - Information and Tourist Guide. Loch Lomond is an area close to everyones heart. It is 23 miles long, 5 miles wide, more than 600ft deep, lies 22ft above sea level and covers 18,000 acres. The rugged highland peaks with hidden glens and passages are steeped in history and heritage. Full of romance and mystique Loch Lomond has inspired poets and songwriters throughout the centuries.