Imagine Glacial Lake Missoula
To pass the time on a day when the Bitterroot Valley was socked in with an inversion, we climbed what is known locally as the "C Hill", just east of Corvallis, MT. Its summit was just high enough to put us above the inversion layer.
This picture represents how the Bitterroot Mountains could have looked one of the many times the valley was flooded by Glacial Lake Missoua (without the glaciers which we know inhabited the mountains during those times).
The person in the picture just happened to be on the summit the same time as we were and helped provide perspective for this picture, © Mike Hoyt, 24nov05.