It really is water temperature dependant but a good rule of thumb is when the lilacs bloom. The walleyes are in full swing as we caught 30 of them saturday in fremont. The water temp is 42 degrees already so the walleyes will spawn early this year. With the weather this week forcasted for 60, the walleyes will spawn. If the water temp keep rising at a steady pace the white bass will be early also. Usaully you can plan on mothers day weekend to be good but my guess is that the end of April the white bass will be good.

hope that helps.