The first Ramathon to be held since 1996 sold out in less than eight hours.
The half-marathon is limited to just 1,000 runners and tickets went on sale at noon.
Demand was sky high with 400 entries in just 40 minutes for the rebooted race, which will start and finish at Elvaston Castle on Sunday, June 8.
For those unlucky enough not to get a place you can still put your name down on the reserve list by heading to www.ramathon.co.uk, where you can also sign up to be part of the race day crew.
