This stream is a major tributary of the Dart River, entering from the west about 20km above Lake Wakatipu, near the start of the famous Routeburn Track. The river upstream from the start of the track does not hold many fish. Most anglers approach the river from the Lake Sylvan car park (a few hundred metres off the Routeburn Road), and tend to fish the stretch downstream to the confluence with the Dart. The Routeburn doesn't hold many fish, but those that are there - both rainbows and browns - are usually big. To protect these fish from early season plundering, catch and release regulations were introduced in 1992. Above the Lake Sylvan track swing bridge there are a few deep pools which test the skills of fly fishing enthusiasts. The lower Routeburn is sheltered from the often gusty north-westerly winds, which can ruin a day's fishing in most of the surrounding area. Popular dry flies include Black Gnat, Humpy, Royal Wulff and Cochybondhu. Green Caddis and Hare and Copper are among the better nymphs. Spin fishers are advised to try Hexagon wobblers, Veltics, and Z-spinners in small to medium sizes. [Fishing Regulations](https://fishandgame.org.nz/assets/Uploads/FG-Fishing-Regs-SI-20-21-.pdf)