Montana Kayak Registration: Exemptions, AIS Pass & Motor Rules (2026)

Do You Register a Kayak in Montana?

Usually no. FWP says manually propelled boats are exempt from Montana registration and taxation regardless of length. That covers paddle kayaks, canoes, rowboats, rafts, and similar nonmotorized craft.

Nonmotorized sailboats less than 12 feet are also exempt. Sailboats 12 feet and longer, all motorboats, and personal watercraft must be registered and numbered.

The registration exemption does not remove AIS inspection and pass rules.

Nonresident AIS Pass for Kayaks

FWP says nonresident watercraft launching in Montana must purchase a Vessel AIS Prevention Pass. The fee is $10 for nonmotorized watercraft, including canoes, kayaks, rafts, row boats, pedal boats, stand-up paddle boards, and similar vessels.

Proof of purchase can be electronic or paper. FWP says there is no decal, the pass expires December 31, and it is not transferable between vessels.

Montana residents using nonmotorized kayaks are not charged that nonresident AIS pass, but they still must follow inspection and transport rules.

Inspection Rules Apply to Kayaks Too

FWP says all watercraft, motorized and nonmotorized, must stop at all watercraft inspection stations encountered. All watercraft entering Montana are required to be inspected before launching.

A kayak on a roof rack is still watercraft for AIS purposes. Plan extra time if you are entering Montana, crossing into the Columbia River Basin, or moving between water bodies.

If you were inspected in a neighboring state, keep the paperwork with you, but do not assume it replaces Montana's current inspection-station instructions. You still must stop at any open Montana inspection station you encounter.

What Happens if You Add a Motor?

Adding a fuel or electric motor changes the vessel from manually propelled to motorized. FWP registration rules apply to all motorboats.

For a motorized kayak or canoe, expect a Certificate of Ownership/title step and permanent registration based on vessel length. Most small motorized kayaks fall into the smallest motorboat tier, but confirm the current FWP fee schedule before filing.

For a nonresident, the AIS pass category also changes from nonmotorized to motorized watercraft.

Clean, Drain, Dry

Clean visible plants and mud from the hull, paddle, anchor line, cart, and gear. Drain water from compartments, scuppers, and inflatables. Let the kayak and gear dry before moving to another water body.

Montana AIS rules make this more than a best practice. The inspection system is built around preventing zebra mussels, quagga mussels, and other aquatic invasive species from entering Montana waters.