Strathearn, Perthshire lies near the centre of mainland Scotland and includes the towns of Crieff, Auchterarder and Comrie.
"Strath" means valley - Strathearn is the valley of the River Earn. The River rises in the Scottish Highlands, flows into Loch Earn, down through the Strathearn towns of Comrie and Crieff and into the Tay Estuary just beyond Bridge of Earn. A total distance of about 80km.
The Earn is one of Scotand's major east-west rivers which in past times must have been a major obstacle for travel. In wet weather the river itself would have been very difficult to cross and prior to draining for agricultural use the wide valley floor was marshy.
Western Strathearn is truely Highland with mountains rising to Monroe status (3000ft ) - Ben Vorlich 985m and Ben Chonzie 929m.
The Strath east of Comrie is rich and productive agricultural land.
http://www.strathearn.com/st_where.htm