Local men Alan Smith and Nick Mardall have run through the Lairig ghru from Braemar Police station to Aviemore Police station and back again, in aid of Braemar Castle.
The route one way from Braemar to Aviemore, which is 56 miles long with a climb of 4000, is a well known race in the Scottish Hill racing calendar.
The Lairig ghru mountain pass is the ancient crossing between the Cairngorms from Speyside to Deeside.
The runners are raising money to support the fundraising effort for Braemar Castle.
This iconic building, dating back to 1629, is steeped in the history of the Jacobite uprisings of the 1700s.
Mr Mardall said: “Having seen how much effort goes in to running the castle on behalf of the community we have decided to make a contribution our way.
“All the money raised will go purely towards making the castle a working asset for the community.”
Currently the castle is preparing for some major roof works to protect the interior.
By next year the charity will be preparing for a Big Lottery application to include a visitor center and modern facilities in and around the castle. So far over £1000 has been raised from this run.
For more information visit http://www.deesiderunners.com/dp/node/10