Māwheranui / Upper Grey River — Reefton
Flowing west from the Southern Alps to the Tasman Sea at Greymouth, Māwheranui — the Upper Grey River — winds through native beech forest, steep gorges and wide valleys framed by rugged mountains. The name Māwheranui means “widespread”, reflecting the river’s broad floodplains further downstream.
Beginning near Lake Cristobel and the Lewis Pass, the Upper Grey offers a true backcountry experience. Accessible only by raft, it reveals hidden gorges, cascading waterfalls and tranquil bush-lined reaches where moss, fern and beech thrive in every shade of green.
With its mix of Grade 2 – 3 rapids, Māwheranui is ideal for anyone seeking a balance of fun whitewater and unspoiled West Coast wilderness. Trips depart from Reefton and include all rafting gear, meals and riverside camping where applicable.
Upper Grey 1-Day Adventure
A scenic day trip through lush West Coast forest and gentle Grade 2–3 rapids. Perfect for first-time rafters or those short on time.
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Upper Grey 2-Day Adventure
Journey deeper into the valley through beech forest and steep-walled gorges. Includes riverside camping and hearty meals beside the fire.
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Upper Grey 3-Day Adventure
An extended backcountry expedition featuring the dramatic Gentle Annie Gorge, alpine valleys and starry nights at remote island camps.
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