Mount Dione

Mount Dione is a 2,589-metre (8,494-foot) summit located in the Tantalus Range, in Tantalus Provincial Park, in southwestern British Columbia, Canada. It is situated 17 km (11 mi) northwest of Squamish, and 0.24 km (0 mi) north of Mount Tantalus, which is its nearest higher peak and the highest peak in the Tantalus Range.^[2] The Dione Glacier lies on the southern slope, and the Rumbling Glacier lies to the northeast. Precipitation runoff from the peak drains east into tributaries of the Squamish River, or west into tributaries of the Clowhom River. The first ascent of the mountain was made in 1916 by Tom Fyles and his brother, John Fyles, via the southeast ridge.^[1] The mountain names in the Tantalus Range have a Greek mythology theme, and Mount Dione was named for Dione, the wife of Tantalus.^[1] The mountain's name was submitted by Neal Carter of the British Columbia Mountaineering Club, and was officially adopted on June 6, 1957, by the Geographical Names Board of Canada.^[3][4]

Mount Dione
Mount Dione (left) with Mount Tantalus
Highest point
Elevation	2,589 m (8,494 ft)[1]
Prominence	129 m (423 ft)[1]
Parent peak	Mount Tantalus (2608 m)[1]
Listing	Mountains of British Columbia
Coordinates	49°48′57″N 123°19′45″W[1]
Geography
Mount Dione Location in British Columbia Show map of British Columbia Mount Dione Location in Canada Show map of Canada
Interactive map of Mount Dione
Location	Tantalus Provincial Park British Columbia, Canada
District	New Westminster Land District
Parent range	Tantalus Range Pacific Coast Ranges
Topo map	NTS 92G14 Cheakamus River
Climbing
First ascent	1916 by J. Fyles and T. Fyles[1]
Easiest route	Scrambling Southeast Ridge

Climate

Based on the Köppen climate classification, Mount Dione is located in the marine west coast climate zone of western North America.^[5] Most weather fronts originate in the Pacific Ocean, and travel east toward the Coast Mountains where they are forced upward by the range (Orographic lift), causing them to drop their moisture in the form of rain or snowfall. As a result, the Coast Mountains experience high precipitation, especially during the winter months in the form of snowfall. Temperatures can drop below −20 °C with wind chill factors below −30 °C. The months July through September offer the most favorable weather for climbing Dione.

Climbing Routes

Established rock climbing routes on Mount Dione:^[1]

• Southeast Ridge - class 3 First Ascent 1916
• West Face - class 5.10b FA 1996
• West Buttress - class 5.10c FA 2002

Gallery

• 
  Alpha Mountain (left), Dione and Tantalus to right, as seen from the Sea to Sky Highway

See also

• Mountains portal

• Mount Niobe (Niobe, daughter of Dione)
• Geography of British Columbia
• Geology of British Columbia