mount brown and lake mcdonald, glacier national park, montana, usa.

glacier national glacial geologic ecology ptarmigan lake mountains trail montana structure serenity natural landscape outdoors hiking nature iceberg grinnell destination icebergs glaciernationlpark naturevalley naturebend background backpacking beautiful reservation mountain wilderness hike recreation lookout summer landmark valley peak waterfalliceberg watertfalls manyglacierhotel swiftcurrent lake_josephine wooden woodenbridge grinnel_mountain grinnell_lake waterfall redbus redbustourglaciernationalpark redbus_tour_montana going_to_the_sun_road goingtothesunroad waterfalls valleyview crement-mountain logan-pass-visitor-center sunrift-gorge barring-falls red-bus-tour redbustour red-bus-tour-glacier-national-park rising-sun gnp mcdonald avalanche avalanche-lake woodinwater forest otw mount brown snow brownsnow mount-brown mount-brown-glacier-national-park goat mountain-goat fire fire-lookout usa