*All watercraft (motorized and non-motorized) with uninspectable water holding compartments are prohibited from launching in Glacier National Park. Lake McDonald - Second Saturday in May. Trailered watercraft with gas-powered motors are permitted on Lake McDonald after an inspection and after being quarantined for 30 days prior to launch. Boats will be sealed to the trailer after inspection and seals will be removed by park personnel following the 30-day drying time.
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