Idaho bowhunt broadhead rules
Idaho is one of the strictest states in the country on broadhead type during archery-only seasons. Mechanical (expanding) broadheads are prohibited for taking big game in archery-only hunts. Idaho Fish and Game manages the rule under IDAPA 13.01.08 and the annual big game seasons and rules booklet. Fixed-blade heads only.
The rule
IDAPA 13.01.08.302 and the current Idaho Big Game Seasons and Rules booklet specify: during archery-only seasons, arrows must be tipped with fixed-blade broadheads. Mechanical broadheads (expanding, deploying, or retractable blade heads) are not legal. A fixed head must have at least two cutting edges. There is no minimum cut-diameter figure specified in the rule, but broadheads must be no less than 7/8 in wide overall in some publications; check the current booklet for the year hunted.
Blade count and minimum cut
Two cutting edges minimum. Blade material is not restricted; steel is standard. Barbed heads are legal in Idaho (unlike Oregon).
Species restrictions
The mechanical prohibition applies to all big game taken in archery-only seasons: elk, deer (whitetail and mule), pronghorn, black bear, mountain lion, moose. General any-weapon seasons allow mechanicals where legal for that hunt. Turkey and small game rules are less restrictive.
What this means in practice
If you hunt Idaho archery-only elk or deer, leave the Rage and SEVR at home. Slick Trick Magnum, Iron Will S100, G5 Montec, Cutthroat single-bevel, Wasp Boss, and QAD Exodus are all legal. Confirm on the current booklet before hunting; the rule text can be updated year to year.
Source
Idaho Fish and Game rules at idfg.idaho.gov/rules. Read the current Big Game Seasons and Rules booklet for the year you hunt.