About This Route
St. Mary Lake, Glacier's second-largest at 1,500 acres, beckons paddlers from Rising Sun picnic area or boat launch for turquoise voyages toward Wild Goose Island overlook. Paddle 3-5 miles roundtrip amid Rockies vistas; east-side access requires AIS inspection at St. Mary station. Open late May to late September; serene waters host bald eagles, but winds funnel through Sun River Gap. Free NPS permit post-inspection is mandatory; combine with Going-to-the-Sun Road hikes.
Safety Considerations
Afternoon katabatic winds generate 1-2 foot chop; launch early per ranger advice. Water rarely exceeds 60°F, risking cold shock; don REI PFDs and paddle leashes. Invasive mussels threaten; triple-wash hulls. Rocky entries demand neoprene booties; avoid Baring Falls inlet currents. Lightning storms roll in fast; seek shore cover. Leave No Trace: no anchoring on meadows. Osprey dive-bomb intruders near nests.
Essential Gear
Include Perception kayak paddle, pump sponge, and Sea to Summit drysack. Bear spray for east-side grizzlies.
Emergency Tips
Cap-size? Right boat on windward shore. Three fires or orange flares signal St. Mary Visitor Center; satellite phone to park dispatch.