A jogger was violently attacked while on a popular scenic trail about 10.15am on Monday.

The 59-year-old woman was allegedly grabbed from behind by a teenage boy and choked unconscious while jogging down Oak Hill on the Centenary Trail at Bonner, in the northern tip of the ACT.

The 138km trail, popular for walking and cycling, runs along the NSW border, through urban and rural Canberra.

Know the news with the 7NEWS app: Download today

The woman lost consciousness for a short period while being choked, and was struck in the head when she tried to escape after regaining consciousness, ACT Police said on Wednesday.

“As a result, the woman fell to the ground, where the boy continued assaulting her,” police said.

“After the assault, the teen allegedly took the woman’s phone and ran away.”

The woman ran for help along the trail and eventually came across another woman, who helped her call Triple-0.

Police and paramedics were called to the scene, and the woman was taken to Canberra Hospital, where she was treated for minor injuries.

A 15-year-old boy was found by police shortly after and arrested.

He was charged with an act of indecency without consent, assault occasioning actual bodily harm, choking a person to render them insensible, and robbery.

He was taken for a mental health assessment and faced the ACT Children’s Court on Wednesday.

The teen remains in police custody until he next appears in court on June 23.