In Idaho, largemouth and smallmouth bass are lumped together in the rule book. Limits are for the total of largemouth and smallmouth bass together. The bag limit and size restrictions depend on the water. For general rules waters, the limit is six bass. North of the Salmon River there is no length limit; south of the Salmon none under 12 inches may be taken. In quality bass waters, no bass may be kept until after July 1, and after that the limit is two, none between 12 and 16 inches. In waters managed for trophy bass, the limit is two fish, none under 20 inches. There are some exceptions so check the rules brochure for the water you want to fish. If that water is not listed under "exceptions," then the general bass rule applies.