Also known as: The Karamea
Kahurangi NP (NZ's 2nd-largest); limestone and granite gorges, earthquake lakes, Garibaldi Ridge / The Pyramid, big trout pools, delightful little gorges

Whether there is a river here on your dates, and what kind of water it is.
Rain-fed West Coast; gauge Karamea at Gorge: ~1 m optimum (~50 cumecs), 0.9-1.1 m ideal, 1.3-1.6 m high for expert teams, 1.6-2 m lower gorge V/VI, >2 m flooding. Confirm gauge pre-trip.
Oct-Apr; needs carefully chosen weather/flow window
October-April (commercial Oct-Apr); stable low-flow windows
Cool West Coast water; wetsuit/drysuit; not glacier-fed but cold
Drains steep country; rain sends river from difficult to extreme quickly; carry time/food to sit out rain; side creeks can render track impassable
A river changes grade with its level. These grades describe a normal flow - in flood the same run is harder, and often a different run entirely. Check the gauge before you commit.
Grade V with portages (III continuous upper, IV+ middle, V portaged sections, IV granite lower gorge); commercial rated 4-5; lower gorge V/VI at high flow
Rafting; kayak; packraft
3-day heli commercial vs 6-8 day walk-in self-support; portage Roaring Lion and major rapids; tributary side trips
Expert self-sufficient teams only; solid crew essential; no easy escape below Karamea Bend; commercial trip min age 15, group 6+
Roaring Lion Rapid (~800 m gauntlet of Class V drops/chutes/house-sized boulders - most portage river left, deflate and pack); earthquake block-up portages above Thor Hut; Ugly gorge; limestone sieves and undercuts
3 major portages plus optional; limestone sieves, undercuts, poorly consolidated rock rearranged in floods; Roaring Lion portage; loaded-boat carries over sharp slippery limestone
Upper granite boulder gardens (III); earthquake block-up portages above Thor (1929 Murchison quake); Roaring Lion Rapid (~800 m, Grade V crux); Ugly / lower granite gorge (IV); Karamea Gorge finale
Extremely remote; roughly one party per year paddles it (hut books); near-guaranteed solitude
Kahurangi NP; DOC hut fees; commercial rafting concession (Ultimate Descents NZ). Confirm concession/fees.
Permits and operators change - confirm before booking.
Walk-in via western Wangapeka Track (Little Wanganui Saddle) to Trevor Carter/Thor Hut put-in, or heli-in (commercial); take-out Umere Road Fish & Game access point (good parking)
Short ~22 km car shuttle (Umere Rd take-out to Wangapeka Track start); hub Karamea
Abundant DOC huts: Belltown Manunui, Taipo, Trevor Carter, Thor, Crow, Roaring Lion, Greys; hut-hopping possible; commercial riverside camping
Full expedition/whitewater kit; TiZip or open packrafts ease long portages; PLB essential; no comms; extra food for weather delays
Karamea; Westport; Nelson
Limestone sieves/undercuts (bad place to swim); Roaring Lion Class V; rapid flood escalation to V/VI; portage injuries on slippery limestone; treat every descent as a first (river rearranges)
No easy walking escape below Karamea Bend; side creeks impassable in rain; carry PLB; effectively self-rescue only once on river
Guided 3-day commercial (Ultimate Descents NZ) or expert self-support team; solid crew mandatory
This profile is desk research, compiled from public sources - not a first-hand river run report. Coordinates are approximate.