Four teams of firefighters are tackling a large gorse blaze at Sandyknowe Farm near Smailholm.
The flames have spread over an area of approximately 100 metres by 50 metres but no buildings are affected.
The alarm was raised around 11.45am and the first crew from Kelso on scene called for extra appliances.
Shortly after 1pm Fire and Rescue Service controllers in Edinburgh confirmed they were still trying to bring the fire under control using high pressure hoses and beaters.
Crews are attending from Kelso (2), Jedburgh and Galashiels.