The Little Truckee river from highway 89 to the confluence of the Truckee river which is just below Boca Reservoir dam has many fishing rules and regulations.
When I go to this stretch of river my go to fly is a San Juan worm in bright red. I fish it without weight and find most of the fish holding in structure. You can catch both Browns and Rainbows. None will be really large unless you fish the Little Truckee in the spring or fall when spawning fish can be caught.