The West Branch of the Kiewa is a clear, high-elevation river in the Alpine National Park, and the reason to make the trip is a lot of willing rainbows and browns on dry flies. Expect plenty of smaller fish, not trophies.
The fishable water is steep, bouldery pocket water with the occasional deep pool. Its top end is where Diamantina Creek joins, and it ends downstream at a diversion dam at Simmonds Creek.
The trip is the pocket water on a dry with a nymph under it, and you can fish it without fussy presentations. The water is often clear enough to sight fish, so look before you cast. The current Victorian Fisheries Authority guide sets the season and limits, so read it before you settle on a date.