If you visit, strap-on you snow-shoes & test the "warmer"waters...you may be surprised.Here's an excerpt from an article I authored for the Spring 2009 issue of Sierra Fisherman magazine; entitled "Early Season on the Truckee River":
"During winter and spring, California’s Truckee river is fly fished like most freestone streams in the California. Water flow and water temperature are the key factors governing strategy; and why fly anglers adjust tactics accordingly. For consistent success; simply, fish…“low & slow”. For surface addicts; wait as springtime wanes into summer; there will be an occasional, although limited, opportunity to feed that jones.
"If accessing the river during January, February and March (snow-shoes are a good idea); go at mid-day seeking warmer water exposed to solar heating. You’ll find warmth in “soft water”, mild currents, edges and eddies. During May to mid-June; ideal conditions may still be an “iffy” proposition; wholly dependent on the snow-melt. Your best ploy remains the earlier months’ tactics of stripping streamers or a preferred technique with a tandem, big/small fly rig deep in the deep runs, troughs and pools and in the lower-water column of eddies in boulder-strewn pocket-waters.
Early in the year there are sparse surface emergences. You will observe the ubiquitous, little, black winter stones peppering the snow banks and flitting above/on the water surface; midges, March Browns, first-brood BWO, and thus far, an unconfirmed Skwala hatch. Don’t hold your breath anticipating many, if any, of these bugs getting eaten on top…"