Firefighters raced to the iconic landmark shortly after 4pm on Sunday afternoon, after tourists who were climbing the hill were seen running down the hill to escape the quick-moving flames.
Police Scotland are also on the scene with members of the public having been urged to stay away from the area.
Shocking video footage shows flames and smoke spreading across the hillside as pockets of bright orange flames engulf shrubbery and trees. Dramatic images also show the devastation caused by the blaze.
A Police Scotland spokesman said: “Emergency services are responding to a fire at Arthur’s Seat in Edinburgh. Motorists and pedestrians are advised to avoid the area.”
The Scottish Fire and Rescue Service (SFRS) confirmed they responded to the alarm at Arthur’s Seat at 4.05pm on Sunday. A spokesperson for SFRS said: “We have three appliances and specialist services in attendance.”
1. Flames spreading
Flames were seen spreading down the hillside with one witness having said pockets of fire kept starting as others were extinguished. | National World
2. Orange flames
The fire is raging across the hillside and orange flames can be seen for miles. | Dominic Grant
3. Seen for miles
The thick smoke can be seen for miles coming from the top of the famous Edinburgh landmark. | Jamie Beaton
4. Shocking sights
Flames can be seen spreading on the top of Arthur's Seat and down the hillside. | Marion Allan