A woman will face court today after a fatal crash at Coffs Harbour last month.

About 6pm on September 4, a 56-year-old woman was driving a Mazda 6 south on the Pacific Highway, Boambe.

She allegedly crashed into a Subaru Forester, before crossing into northbound lanes and colliding with a Nissan X-Trail.

The Nissan driver, a 69-year-old Bonville woman, suffered critical injuries and was taken to Coffs Harbour Health Campus, where she later died.

The Mazda driver suffered back and hand injuries, and was taken to the same hospital for treatment and mandatory testing.

The Subaru driver, a 29-year-old woman, was uninjured.

The 56-year-old woman was arrested at Coffs Harbour Police Station yesterday.

She was charged with several offences including driving with a high range PCA, and aggravated dangerous driving occasioning death.

The woman allegedly returned a blood alcohol reading of 0.208.

She was refused bail, and will face Coffs Harbour Local Court today.