A motorcyclist has been seriously injured following crash on Paddys River Road this afternoon.

At about 2pm, ACT Emergency Services responded to reports of a motorcycle crash on Paddys River Road near the intersection of Laurel Camp Road.

The rider A 20-year-old female was treated at the scene by ACT Ambulance Service paramedics and transported to hospital in a serious but stable condition.

ACT Policing's Major Crash Investigation team attended the scene and are investigating the crash.

The road was closed for about 2 hours while investigations were carried out.

ACT Fire and Rescue were also in attendance.