Altitude: 377m to 2572m. Gain: 5762m. Loss: 5786m . Gradient: 10 deg (Moderate-hard)
Skills: Glacier travel required (7/7) - Prolonged rivers (4/6) Winter - High avalanche risk, iceaxe/crampons (7/7)
Off-track tramping and mountaineering circumnavigating Sir William Peak.

Altitude: 473m to 521m. Gain: 107m. Loss: 127m . Gradient: 2 deg (Flat)
Skills: - Prolonged rivers (4/6)
From the trailhead at Muddy Creek, the track descends to the valley floor. Although remaining on the TL, the track crosses several side streams - keeping your boots dry is not an option.
Poles assist your passage past a boggy section at Arthurs Creek, about 2km from the start of the tramp. Otherwise, it's a pleasant stroll (in good weather) up the grassy valley.

Altitude: 507m to 926m. Gain: 436m. Loss: 20m . Gradient: 11 deg (Gentle)
Skills: - Occasional rivers (3/6)
A poled route leaves the Rees-Dart track and crosses the Rees about 1km north of Twenty Five Mile creek and leads to the bushedge below Kea Basin.Once in the bush a good cut, marked track zigzags far more than the topo map indicates as it climbs onto the marshy, clear knob at pt777. A second shorter climb follows to a marked track junction. Earnslaw Hut is 20m down the right-hand track. The lefthand track continues to zigzag for another 200m before emerging from the bush into Kea Basin. The first of many rock bivs is located just left of (below) the track as you emerge into the basin proper.

Altitude: 937m to 1064m. Gain: 127m. Loss: 0m . Gradient: 13 deg
Skills:
Follow track.

Altitude: 1056m to 1719m. Gain: 685m. Loss: 573m . Gradient: 13 deg (Moderate-hard)
Skills: Prolonged scrambles (4/7) - Streams (2/6) Winter - High avalanche risk, iceaxe/crampons (7/7)
Follow ground trail on the Esquilant Biv track until the giant cairn at around 1650m, traverse north (scree/tussock) to reach ridge above Hunter Creek South Branch. Descend ridge and cut back left on easy slopes to reach the South Branch. Some short scrub sections to reach the river flats.

Altitude: 1168m to 1616m. Gain: 448m. Loss: 0m . Gradient: 21 deg
Skills:
Climb moraine wall and follow along top of wall. Follow stream to reach flatter area at about 1600m.

Altitude: 1627m to 2572m. Gain: 965m. Loss: 20m . Gradient: 16 deg
Skills: Glacier travel required (7/7)
Gain flattish slopes at about 1720m and traverse to reach the Grant Glacier. Ascend glacier to about 2400m and climb steeply to south ridge of Mt Head and Jura Glacier. Ascend glacier and then summit pyramid.

Altitude: 1627m to 2572m. Gain: 20m. Loss: 965m . Gradient: 16 deg
Skills: Glacier travel required (7/7)
Note: Described in the reverse direction to your journey
Gain flattish slopes at about 1720m and traverse to reach the Grant Glacier. Ascend glacier to about 2400m and climb steeply to south ridge of Mt Head and Jura Glacier. Ascend glacier and then summit pyramid.

Altitude: 1168m to 1616m. Gain: 0m. Loss: 448m . Gradient: 21 deg
Skills:
Note: Described in the reverse direction to your journey
Climb moraine wall and follow along top of wall. Follow stream to reach flatter area at about 1600m.


Altitude: 1163m to 2148m. Gain: 1010m. Loss: 559m . Gradient: 13 deg
Skills: Prolonged scrambles (4/7)
Follow Moir's description.

Altitude: 1614m to 2558m. Gain: 975m. Loss: 327m . Gradient: 16 deg
Skills: Snow / ice (5/7)
Ascend stream directly to Shepherds Pass. Scramble up unlikely-looking ledges in a zigzag fashion on the west side of the ridge in the direction of O'Leary Peak to reach to ridge 100m or so above the pass. Ascend easy scree/snow to Luncheon Col. O'Leary Peak easy scree/snow to summit.
Descend Luncheon Col, we did not take the best route and descended almost directly, this involved steep downclimbing (belayed) just above and crossing the shrund to the Birley Glacier proper. The better route (as we saw from below and as marked on the topo) would be to traverse/descend SW before cutting back in an SE direction down a broader spur to reach the glacier proper.
Easy travel across Wright Col to the Biv.

Altitude: 1421m to 2268m. Gain: 16m. Loss: 857m . Gradient: 17 deg
Skills: Glacier travel required (7/7)
Follow Esquilant Biv/Wright Col descent route as per Moirs to reach the tarn near Pt 1445.

Altitude: 1404m to 1695m. Gain: 411m. Loss: 146m . Gradient: 7 deg
Skills: Mountaineering (6/7)
Traverse the wide tussock shelf past tarns to reach Lennox Creek. The creek is a deep gorge and it requires scouting to find a route across and down the other side. It also requires climbing and abseiling ability is an exposed situation. We ascended 100-150m to a rocky buttress, stepped across the gorge, followed by a 5m belayed vertical climb to another rocky outcrop. Then two abseils (one about 20m off a wire, second about 30m off some boulders) to reach the walkable tussock shelf/slope. We then kept the height and traversed until we could make a rising traverse to Lennox Pass. It would probably have been smarter to descend 100-150m on the slopes below pt 2026 to avoid some steeper craggier sections.

Altitude: 380m to 1935m. Gain: 350m. Loss: 1671m . Gradient: 10 deg
Skills: Alpine weather (2/7)
Follow the ridge south, at times descended to the west side to traverse steep sections.
Public carpark (unsignposted) on true left of Earnslaw Burn

Altitude: 377m to 519m. Gain: 212m. Loss: 73m . Gradient: 2 deg
Skills: - Occasional rivers (3/6)
Cross farmland, Rees River to join the road back to the Rees Valley roadend.