The journey from Thornhill to Inverness is a 300 km drive. You will head north on the A76, join the M74, and then the A9 towards Inverness. The drive takes approximately 4 hours. Inverness is the capital of the Highlands.
Total Distance: 300 km driving distance, 250 km straight-line distance.
The A9 can be busy; check traffic reports.
Year-round, as the M74 and A9 are major roads.