Apparently, it would take ten days to walk from John O'Groats to Stonehenge today ...
Even by modern standards, John o’Groats to Wiltshire is a bit of a trek: nearly 500 miles, 13 hours by car or a 10-day walk – and that is without having a six-tonne block of stone in tow.
Apparently, it would take ten days to walk from John O'Groats to Stonehenge today ...
https://www.theguardian.com/uk-news/article/2024/aug/17/stonehenges-altar-stone-carried-north-east-scotland-but-how
50 miles in a day sounds like elite-level walking to me.