The present shape of the high country was largely sculpted by glaciations during successive Ice Ages over the last 2.5 million years. Large valley glaciers moved as far as : down the South and Middle Forks of the Kings River, carving out the distinctive deep U-shaped valleys at Cedar Grove and Paradise Valley on the South Fork, and Tehipite Valley on the Middle Fork. Ice Age glaciations did not extend all the way to the confluence of the Middle and South Forks; consequently, the canyons downstream of Cedar Grove and Tehipite are typical V-shaped river gorges, in contrast to the U-shaped valleys upstream.: