The Nisqually Glacier is one of the largest glaciers on the southern slopes of Mount Rainier. The glacier has retreated up the valley since this photo was taken, but at the same time it also appears the glacier is getting thicker. Records do show that the glacier has advanced and retreated in pulses over several years period. This is bit of an enigma as most glaciers in our region are retreating. There may be more at work here than just climate changes.