Closest rivers I know of near Eugene for winter steelhead would be Lake Creek and the Siuslaw. You might be able to run your sled on the lower Siuslaw...but not on Lake Creek anywhere I have fished..or on the upper Siuslaw. Bring it on down to the Rogue! Only a 2 hour drive and fishing is way...WAY better
maybe the santiam or mckenzie. both have plenty of water. siuslaw maybe up a little ways past where lake creek dumps in, but it's pretty rocky.
if you try lake creek, pretty sure you'll be buying some new boat parts.
Fish the Willamette near Jasper. Plenty of jet boats fish there, and the summer runs stay in the river all year. It was awesome fishing last year around thanksgiving. Might be a few winter strays but mostly holdover summer fish
I was at the Leaburg Hatchery today and asked the hatchery manager about winters. There are no winter's released from Leaburg. They had a trap out all winter and only one fish was caught and that was a tagged summer.