The Timaru River Track follows the river to the head of the valley. It crosses 1,680 m Mount Martha Saddle to descend into the Ahuriri Valley and Conservation Park.
It passes through mānuka, kānuka, matagouri and briar on the valley floor and in the upper sections, mountain beech/taumaka forest and tussock.
The lower section, on the Lake Hawea side, has a loop track for day walkers and also access to both Corner and Dingle Peaks.
The track is also a section of the Te Araroa Trail - The Long Pathway - the national walking trail from Cape Reinga to Bluff.
Time 10 - 11 hr
Distance: 23 km
The marked track starts on the river's true left and crosses it several times during the first hour.
It then crosses open flats near Junction Hut (private). The going becomes more awkward, but the track is clearly marked. It progresses through heavily gorged sections around side streams, and along scree slopes.
A slip on a section of track 50 m downstream from the Timaru River/Breast Hill track junction requires care when crossing, as it is a bluffy section with a vertical drop on one side. From the treeline, it's an hour of open travel to Top Timaru Hut.
Time: 5 -6 hr
Distance: 21 km
Follow the farm track above the hut to the head of the valley and climb up the 1,680 m saddle below Mount Martha. From this high point, the track descends into the Avon Burn catchment and passes Tin Hut (private). This is a pleasant walk above the burn, leading to the carpark on Birchwood Road.
Time: 4 - 5 hr return
A high river track, signposted 50m along the road leads to a 4WD track above the Tīmaru River. Follow this undulating track to Deep Spur Creek near Junction Hut (1.5 km), cross the river and return via the way of the Lower Timaru River track.
River crossing skills required; loop track may not be possible after heavy rain.
Track category: Tramping track
Distance: 12 km return from Top Timaru Hut
Time: 5 – 6 hrs
Follow Timaru River track 1 km downstream from Top Timaru Hut to reach the start of Mt Prospect Track.
The track steadily climbs for 5 km to reach Mt Prospect at 1770 m. For the last 1 km to Mt Prospect there is no track so follow the fenceline passing the junction with Mt Melina track on your left. Return the same way. This track is mostly an unmarked old 4WD road. Good navigational skills are required.
Be aware there are several stream crossings that can become uncrossable in heavy rain.
The carpark at the start of the Timaru River Track is 10 km from Lake Hāwea Township, on the unsealed Timaru River Road.
Adverse weather: The weather can change rapidly in New Zealand. Hypothermia is a real risk even in summer. Be prepared by having warm, waterproof, windproof clothing and the appropriate footwear. Whiteout conditions caused by snow or low cloud may be present. Check the Mount Aspiring National Park weather forecast – NIWA website.
Unbridged rivers: There are river and stream crossings that become hazardous in heavy rain or snowmelt. Be prepared to turn back or wait for the river to drop.
Be avalanche alert: This area has terrain that can produce avalanches that cross the track, usually from May into November. View avalanche information.