The Glen Ogle viaduct is located 2 miles north of the village of Lochearnhead in Perthshire. The postcode of the viaduct is: FK21 8SZ. Lat/Long is 56.40743307995052, -4.3161122444975994. Glen Ogle extends for 7 miles from Lochearnhead to Lix Toll which opens up onto Glen Dochart.