Lower Yuba river has been good with small hoppers near the banks according to Mark Merrill at Kiene's Travel Department.
Madison river out of Ennis, Montana, has been good with hoppers according to Nor Cal guide Bryce Tedford.
The Truckee river can be good with hoppers now too. Windy afternoons can be good in some places.
The Missouri river near Craig and Cascade, MT has good hopper fishing this time of year......windy days are good.