If you follow the salvage reporting requirements, it is legal to salvage a road-killed wolf and bleach the skull.
Within 24 hours of collecting the wolf, you must report it by going online to fishandgame.idaho.gov/roadkill, which will direct you to a self-generating permit that you can print. A copy of the permit must accompany the salvaged wildlife.
You can also report the wolf salvage by contacting your nearest IDFG regional office, conservation officer, or other Fish and Game employee within 24 hours. If contacting Fish and Game by phone outside normal business hours, it’s critical you leave your full name, phone number, address, and location of salvage so a permit can be issued and mailed to you within 72 hours.
In addition to reporting a salvage, the wolf skull must be presented to your nearest IDFG office within 10 days of salvage to satisfy mandatory harvest tagging/pinning report requirements.