Rock Creek Reservoir is one of the first of Northern Oregon's lakes to turn on in early spring.  Its comparatively low elevation and location in the rain shadow of the Cascade Mountains gives it a moderate climate.  The most prolific fishery is for stocker rainbows, but some very large brood trout are added and their seems to be some wild trout too.  Bass and blue gills add to the excitement.
Fishing is done with both floating and sinking lines.  There are hatches of all of the usual lake dwelling critters.  The ant falls and Callibaetis May Fly hatches can provide some great surface fishing.  Fishing small nymphs and soft hackles subsurface can be very productive. Wooly Buggers and Leeches in black, olive or maroon drug along the bottom catch both bass and trout.
This is an ideal lake for both float tubes and small pontoon boats.  
All parts of the lake can be productive.  Creek inlets and edge water can pay off early in the season.

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Regulations: general/bait allowed - no motors allowed