The fishing is Fair to Good. Ice should be mostly if not completely off.
Best Flies: Boatman, Black Leeches/Buggers, Scuds
Best Lures: Copper or Silver Kastmaster
Best Baits: Red Powerbait, Nightcrawlers
To locate Diamond in a “maps app” search for Bosler Reservoir or you will end up in the wrong place on private land.
Take I-80 to exit 279 Cooper Cove and head north.