Lathrop Saddle

From Crawford Bivvy in the Kokatahi Valley, a lightly poled route leads up north-west through open patches of scrub onto a spur at J33 690073 / BV19 590 457. It continues north across slopes under bluffs, climbing up into the basin draining from Lathrop Saddle. There are campsites in these basins, but also quite a lot of rock.
To descend to the Styx, head north-west from the saddle to the top of a small rib. Browning Bivvy (DOC, two person) is located lower down this rib. Markers lead moderately steeply down the rib to a flatter area just above the bivvy. From the bivvy, the marked route continues steeply down before sidling into the creek bed to the east at about the 840-metre contour.
Going up, the point where the track leaves the creek can be easily missed. The creek itself offers greasy but reasonable travel, until further down a marked route begins again on the true left, leaving the creek bed and following the bush fan not far away to finish on flats near Grassy Flat Hut.
Times: Crawford Bivvy to Browning Bivvy, 3–4 hrs; Browning Bivvy to Grassy Flats, 2 hrs down, 3 hrs up