Distance: 3.2 km (2.5 DOC hours) - Unmarked route, clear - Moderate-hard terrain
Altitude: 376m to 1207m. Gain: 53m. Loss: 833m . Gradient: 16 deg (Moderate)
Skills: - Occasional rivers (3/6)

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

Secondary, unmapped (4/5)
Route not on maps, an alternative recognised access to hut or along range / catchment

Moderate (difficulty: 3/5)
Occasional moderate climbs

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

None (difficulty: 1/7)
No alpine skills required

Occasional rivers (difficulty: 3/6)
Occasional rivers - impassible after heavy rain

None (difficulty: 1/7)
No alpine skills required

From Mid King Bv, follow the DOC triangle ENE up to the spur, gaining some 100m. Then follow the scrubby spur east down towards Mitre. Going is tough at first but around 1100m you enter good pen bush. From here a good ground trail leads down the spur to the valley floor. From the confluence of Baldy Creek and South Mitre Stream, head downriver in the riverbed until you hit the Mitre Hut Track. The river is ankle deep in normal flows, but can clearly flood. Mitre flats Hut is 100m north up the track.
When descending, about 3/4 the way down, look for small rock cairn with accompanying pink markers where the track bears right. Similarly as you near Baldy creek the track again bares right before meeting Baldy creek

Note: Described in the reverse direction to your journey

From Mitre Flats hut, head briefly downstream to the confluence, and then up South Mitre Stream. This requires a few crossings - ankle deep in normal flows but a huge riverbed so it can clearly flood. Pass Baldy creek joining from your right and continue up Sth Mitre until the spur to your west starts to look good travel.

Leave the riverbed and climb west up the face onto the spur. A good ground trail runs up the spur through open bush to the bushedge at 1100m. From the bushedge, scramble on up the scrubby ridgeline until you hit triangles at around the 1200m contour. A triangle-marked route drops WSW off the spur into the basin to its south, dropping 100m to reach Mid King Biv, which is where the map says it should be.