Distance: 2.5 km (1.5 DOC hours) - Unmarked route, clear - Moderate-hard terrain
Altitude: 1405m to 1587m. Gain: 141m. Loss: 254m . Gradient: 9 deg (Moderate-hard)
Skills:

Unmarked route, clear (7/9)
Unmarked route, follows obvious geography (river, spur, trail, etc)

Primary, unmapped (2/5)
Route not on maps, but is principal access to hut or along range / catchment

Moderate-hard (difficulty: 4/5)
Continuous moderate climbs

Moderate-hard (difficulty: 4/5)
Tall, walkable scrub / large rocks, occasional waterfalls or gorges in rivers

Unknown (difficulty: 0/7)
Not specified

None (difficulty: 1/6)
No unbridged river crossings

Unknown (difficulty: 0/7)
Not specified

No description

Note: Described in the reverse direction to your journey

From the north shore of Lake Nerine, walk to the west side and climb to the low saddle. From here, there are two routes to North Col.

The low route descends to the 1440m ledge and contours around to the gully below North Col - then up. There are useful cairns along the route.

If visibility is questionable, use the low route. The high route takes slightly longer (and would be very challenging in poor weather).