Kaiaraara Track to Mt Hobson (Hirakimata): Walking Guide, Time & Access

Route overview

Walk to the remains of the old kauri dam, and up to the summit of Mt Hobson (Hirakimata) for a 360-degree panorama.

This DOC directory entry covers Kaiaraara Track to Mt Hobson (Hirakimata) in Auckland, within Great Barrier Island/Aotea. Where DOC groups several walks, times and grades refer to the listed options rather than a single continuous itinerary.

Distance, time and grade

• Distance: Not confirmed on the checked DOC page; see individual route sections
• Walking time: 3 - 3 hr 30 min one way
• DOC grade: Easy

Access and alerts

Source checked 2026-10-08. This page is a dated snapshot, not a live track-status report. Check current DOC route information immediately before travelling. An absence of listed alerts does not establish that a route is open.

• Kaiaraara Track closure; First published on 20 March 2023. Last reviewed on 28 March 2026.

Dog access

No dogs. Other pets on conservation land rules.

Description

Kaiaraara Track offers a striking experience for walkers - a wide array of flora from tiny plants and ground cover to large trees in established forest, historic sites and, towards the summit, panoramas of the island, its bays and beaches and neighbouring islands.

From Forest Road, the track rises steadily to Cooper’s Castle Track junction, crossing the stream in several places using a series of suspension and wooden bridges. A short distance from this junction is a side-track to the remains of the Lower Kauri Dam.

What remains of the Lower Kauri Dam (1 hr 30 min from Kaiaraara Hut) was built in the 1920s, along with six smaller dams higher up. Logs estimated to contain seven million feet of timber were slid into the dams. Once loaded, the dams were tripped one after the other so a full blast hit the lower dam, propelling the logs into Kaiaraara Bay. The Lower Dam was washed away in a storm in 2014 and only the base can be seen in the stream.

The track above the dam area winds through semi-mature forest with good examples of tōwai and large kohekohe. From here, the track climbs steeply via wooden steps that protect black petrel nesting grounds and sensitive ecosystems to the summit.

Getting there

From Port Fitzroy, follow Kaiaraara Bay Road to its end. A short walk leads to Kaiaraara Hut and the start of the track.

Know before you go

Keep to the tracks to avoid damaging rare native plants and disturbing black petrels.

Nature and conservation

Nearing the summit, the track leads into mature forest where logging was too difficult and fires on the lower slopes did not reach. Remnants of an ancient and precious conifer forest, rimu, Kirk’s pine, pink pine and kauri, can be seen here.

Keep an eye out for black petrel. Once widespread on the North Island, breeding colonies of these large, burrow-nesting seabirds are now confined to Great Barrier Island Aotea and Hauturu / Little Barrier Island. The main colony on Great Barrier Island Aotea breeds on the slopes of Mt Hobson (Hirakimata) between October and May each year. Mature birds spend months at sea flying as far as South America and only return to the island to breed. Watch out for them on the road at night.

Sources and reuse

Route descriptions and practical information reproduced from the Department of Conservation, Crown copyright, under CC BY 4.0, subject to DOC's copyright policy. Formatting has been adapted, including flattening page sections; follow the original DOC page for maps, section-specific layout, current notices and linked documents. Outdoor Next is independent and is not endorsed by DOC.

The accompanying photograph is published in DOC's official route gallery with an explicit reuse licence. Its original caption and credit are retained; it does not establish current track conditions.