Idaho motorcycle laws: helmets, lane splitting and more

This page explains Idaho motorcycle laws in plain English so riders know what to look up. It is not legal advice and it doesn't cover every condition or exception. Laws change. Read the source and talk to a lawyer about your situation.

Idaho requires motorcycle riders and passengers under 18 to wear a protective helmet. Riders 18 and older are not required to by state law. Read Idaho Code for the exact rule, and see the IIHS helmet law overview for how Idaho compares with other states.

Not required isn't the same as a good idea. Idaho's best roads are mountain roads with deer and elk on them, gravel in the corners and long distances to the nearest hospital. A good helmet, ideally full-face, also cuts wind noise on a long US 12 day and keeps bugs and rain off your face. Pick one that meets the federal DOT standard.

No. As of 2026, Idaho law doesn't allow lane splitting or filtering. That means no riding between lanes of moving traffic and no moving up between stopped cars at a light. Several states are changing their laws, so check before you ride.

In practice, most Idaho riding is on two-lane rural highways where the question never comes up. It matters most in the Boise metro on I-84 and in Coeur d'Alene near the Washington line. Ride in your lane like any other vehicle.

Neighboring state overviews: the Washington hub and the Oregon hub.

In Idaho, you need a motorcycle endorsement on your license to ride on public roads. It is handled through the Idaho Transportation Department and county driver's license offices. Idaho's state rider training program, Idaho STAR, runs motorcycle courses around the state, and younger riders must complete a course before they can get the endorsement. Check ITD for the age cutoff and current steps.

Training is worth it at any age. Idaho riding asks for skills in gravel, on long downhill grades and around wildlife. If you're new, see our page on the motorcycle app for beginners.

A passenger needs their own seat and footrests, and passengers under 18 must wear a helmet. Equipment rules cover lights, mirrors and other basics, so check Idaho Code before you modify a bike.

Carry your license with the endorsement, your registration and proof of insurance. Idaho requires liability insurance on registered vehicles; check the state for current minimums. Idaho also has a hands-free law that bars holding a phone while driving. Mount it, set the route before you roll and pull over to change anything.

Tap Record Ride once before you roll, pocket or mount the phone and ride. Recording runs in the background and you tap Stop at the end, so there's no reason to touch the phone on the move.

Segments in Rippin' are stretches of road a rider added. Ride through one and you're timed automatically, but the board is about who owns the road and who rides it, not a race. Turf, poker cards and points come from riding, not from riding fast. On roads like US 12 and the Banks-Lowman Road, the next blind corner may hide a deer or a log truck. They're in our Idaho roads guide.

Set a home privacy safe zone so the part of your rides near home stays hidden. Live location is only shared when you start a group ride or broadcast. For the state overview, see the Idaho hub.