All be it my fishing in Washington Rivers is very dated so I'll with Ryan on his answer. But for summer run fishing in the middle Rogue for half pounders and summer runs in the upper river it's a fairly common rod wt. Most will either be indicator fishing or use a sink tip to get the flys down.

"Down here," 6wt rods are very common for summer run fishing; about the largest spey rod would be either the Sage 6wt or the 7wt for these fish.
fae