Gulkana River at Sourdough AK Downstream Primary

Runnable: 500.0 – 10,000.0 CFS

Flow range for best boatability uncertain. Please help your fellow boaters with a comment or report.

Data from American Whitewater & USGS

Put-in

Take-out

Select put-in and take-out to estimate time.

See wind-adjusted speed maps, forecast planning, and detailed time estimates.

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Whitewater timing varies with scouting, portages, and group pace. Use as a planning baseline.

Class: II/III

Difficulty

Class II-III

Length

81.0 mi

Gradient

15 ft/mi

max 50

Rapids

I Easy II Novice III Intermediate IV Advanced V Expert/Extreme VI Unrunnable

Whitewater data from
American Whitewater