North and South Santiam River: North - The spring Chinook run has begun in earnest with over 12,200 Chinook having gone over the falls as of May 20. The forecast for the 2018 Upper Willamette spring chinook run calls for similar numbers as last year, about 35,000 fish.
As of May 21, flows are around 2,230 cfs at the Mehama gauge. River levels best for fishing are at or below 3,000 cfs.
Counts of summer steelhead at Willamette Falls stand at 1,957 fish as of May 20. Many of these fish are destined for the North Santiam, but it will be a few more weeks before the bulk of run enters the river. About 100 early summer steelhead and another 150 spring Chinook have already made it as high as Stayton. As a reminder, the river is closed to winter steelhead fishing.
The river reopens to trout fishing on May 22. Anglers are allowed to keep up to 5 hatchery trout per day, but wild trout need to be released unharmed.
above detroit - This section of the river is open year-round for trout. It will be stocked for the first time this week with 3,000 legal-size hatchery trout.
The river tends to run a little high and silty this time of year from all the snow melt, but flow is decreasing and should be in excellent condition. Anglers may keep up to five trout per day. This section of river is closed to salmon fishing.
South Fork - There are some early summer steelhead already in the river but the bulk of the run will come in May and June. Chinook are also on their way upriver with counts at Willamette Falls now at 12,200 as of May 20. Flows in the river at Waterloo are improving with the drier weather. It is currently around 1,940 as of May 21.
Fishing is improving as more salmon and steelhead are entering the river. The river reopesn to trout fishing on May 22, when anglers are allowed to keep up to five hatchery trout. Catch-and-release fishing also starts this week in the upper river above Foster Reservoir. As a reminder, fishing is allowed only with flies and lures, no bait.