| Pleasant View Ridge, Will Thrall Peak | 5 April 1942 | Fred Johnson, Jack Bascom |
| Will Thrall Dedication | 26 June 1965 | |
| Will Thrall Peak, Pleasant View Ridge, Pallett Mountain | 16 November 1968 | Ben Neffson |
| Pallett Mountain, Will Thrall Peak, Pleasant View Ridge | 1 May 1971 | Lu Petitjean |
| Mount Williamson, Pallett Mountain, Will Thrall Peak, Pleasant View Ridge | 10 July 1988 | Joe Young |
| Will Thrall Peak, Pleasant View Ridge | 14 October 1990 | Ron Young |
| Mount Williamson, Pallett Mountain, Will Thrall Peak, Pleasant View Ridge | 8 December 1990 | Jim Raiford |
| Mount Williamson, Pallett Mountain, Will Thrall Peak, Pleasant View Ridge, View Point | 18 May 1991 | David Eisenberg |
| Mount Williamson, Pallett Mountain, Will Thrall Peak, Pleasant View Ridge | 7 June 1997 | Diane Dunbar |
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