| Mount William (Mount Duwil) | |
| Elevation: | 1167m (3,829feet) |
| Location: | Victoria, Australia |
| Map: | Australia Victoria |
| Label: | Mt William |
| Label Position: | top |
| Map Relief: | yes |
| Coordinates: | -37.2928°N 142.6008°W |
| Range: | Grampians |
| Topo: | Geoscience Australia Mount William |
| First Ascent: | Thomas Mitchell (European explorer) |
Mount William (also Mount Duwil) is a mountain of the Grampians Mountain Range, located within the Grampians National Park, in the Australian state of Victoria. The mountain is situated approximately 250km (160miles) west-northwest of Melbourne on the eastern edge of the national park, approximately 22km (14miles) drive south from Halls Gap.
Mount William is the highest point within the Grampians National Park. Sir Thomas Mitchell reached the summit with a group of explorers in 1836. The first settler in the area was Horatio Wills, who established a sheep run at Mount William in 1840, and named nearby Mount Ararat, after which the town is named. His son, cricketer and Australian rules football pioneer Tom Wills, grew up as a lone white child among the Djab wurrung Aboriginal tribes of Mount William.
Three transmission towers are located at the summit of Mount William including an amateur radio repeater. A sealed service road continues to the summit, but is not accessible by vehicle to the general public.
Visitors to the mountain can drive to a carpark located approximately 920m (3,020feet) up the mountain, before proceeding on foot for 1.8km (01.1miles) to the summit. It will take a person of moderate fitness approximately 45 mins to walk. No permit is required to climb the mountain.
Due to being an exposed peak in the far west of Victoria, Mount William features especially cool maximum temperatures throughout the year. Winter cloud cover is profound; with an extraordinary 26 days of precipitation in July, constituting an annual total of 216 days—quite possibly the highest figure of any site in mainland Australia.
Snowfalls are both frequent and heavy throughout the year. Daily maximum temperatures can struggle above the single digits even in summer, and on such days the afternoon and mid-day readings can be near to in extreme cases such as in December 2022. The peak can be classed as a cold and moist Mediterranean climate (Köppen Csb) on account of the low summer rainfall - in February averaging only of rainfall.[1]