meltwater river from toe of athabasca glacier, jasper national park, alberta, canada

alberta alpine america and athabasca attraction blue canada canadian change climate columbia concept crevasse crevice debris deposit destination emergency environment glacial glacier glaciers global gravel ground harsh heat heritage hike hiking ice icefield icefields jasper landscape melt melting meltwater moraine mount mountain mountains national nature north park parks parkway pass recreation retreat river rockies rocks rocky side site sky snow snowy summer summit sunwapta toe tourism tourist unesco urgency valley warming water waterfall west western wild wilderness world