When To Go: Because the White maintains a temperature around 50 degrees all year, there is absolutely no wrong time to visit. There are, however, times of year that give up more big browns based on the conditions. In the warm months, frequent low, clear water can make the big fish spooky, though with a sharp eye and good casting skills, they can certainly still be fooled. Late winter and early spring are typically the best times to hook big trout because the water level is most often up, offering plenty of current that forces the fish into a reaction strike instead of giving them time to study your baits and lures. The plentiful 12- to 17-inch rainbow trout, on the other hand, will bite ferociously whether there's a foot of water or a flood.