re: Truckee river (CA not NV)
PM temp on the upper river(tahoe-truckee) is 68-69. Too warm for catch and release.
Tenps good below Boca.
Rafters do a casual start, if you go early, fishing is good, and noone on the water.
The last hour is pretty good too.
Fishing more frothy water now, very small nymphs work well.
Weekdays are best.
Ultimately, it's not catching fish that satisfies, but knowing how.