Little Susitna River

About

Little Susitna River, Alaska — Parks Highway Coho, 40,000 User-Days. Long before the gauges and the guide boats, the Little Susitna drainage was Dena'ina Athabascan homeland — and has been for more than 1,000 years. The Dena'ina worked seasonal fish camps along the river and carried dried salmon over the Knik-Palmer pass to trade with interior Ahtna communities. That salmon economy set the template for everything the river would become: a corridor valued first and foremost for what runs up it.

The first outside surveys came in the 1870s, part of the early USGS reconnaissance of the region. Roughly contemporaneous was the timber era. From the 1830s through the 1920s, the watershed was logged to feed the regional timber industry and railroad expansion, worked by local sawmills, logging drives, and downstream lumber operations. That chapter closed as the old-growth stands were exhausted around 1910, state forestry conservation began in 1915, and state forests were established in the 1930s.

What endured was the fishery. Coho salmon fishing on the Little Su dates to the early twentieth century, and by modern reckoning the river carries roughly 40,000 user-days of sport effort annually per ADF&G data — the most heavily used sport salmon stream in the Matanuska-Susitna Borough. Seventy river miles of prime coho water run from the mouth upstream to the Parks Highway bridge at river mile 58. The coho run typically peaks from mid-August through September. Bank anglers dominate the lower river, while jetboats reach the upper sections in fall. The runs are not guaranteed: both the Little Su and the Big Susitna have been subject to emergency orders closing king salmon fishing in weak-return years — notably 2017 — because of chronically low Chinook returns in the Susitna drainage.

Managing that pressure has been a deliberate project. In the 1980s, ADF&G and the Mat-Su Borough developed the Burma Road public use area on the lower river to concentrate bank fishing and reduce trespass on private land; the Burma parking area is now one of the busiest silver salmon sites in southcentral Alaska. The upper river is fed by the Little Susitna Public Use Area, reached by a rough four-wheel-drive trail up the west side. In 1998, the Alaska Legislature folded the Little Su, with the broader Susitna system, into its Recreational Rivers program. The river also carries an ADF&G Recreational Priority Fishery designation under Matanuska-Susitna Borough management.

The river reads in three distinct stretches. The Upper Little Su, from Hatcher Pass to Houston, runs about 40 miles of remote wilderness, with Class III whitewater sections above the Parks Highway bridge that draw rafters and kayakers. The Middle, from Houston to Burma Landing, covers another 40 road-accessible miles holding both kings and silvers. The Lower, from Burma to Cook Inlet, is 30 tidal miles reachable only by boat. Rated Class I–II over its paddling reaches and glacial-fed from the Talkeetnas, the Little Su remains a working river — equal parts wilderness corridor and treasured fishery.