Mount Thiassi

Mount Thiassi
Mount Thiassi, southeast aspect
Highest point
Elevation	2,772 m (9,094 ft)[1]
Prominence	562 m (1,844 ft)[1]
Parent peak	Mount Vayu (2794 m)[1]
Listing	Mountains of British Columbia
Coordinates	50°42′52″N 123°10′58″W / 50.71444°N 123.18278°W / 50.71444; -123.18278[2]
Geography
Mount Thiassi Location in British Columbia Show map of British Columbia Mount Thiassi Mount Thiassi (Canada) Show map of Canada
Interactive map of Mount Thiassi
Location	British Columbia, Canada
District	Lillooet Land District
Parent range	Thiassi Range Coast Mountains
Topo map	NTS 92J11 North Creek[2]
Climbing
First ascent	1965 Dick Culbert, Alice Purdey[1]
Easiest route	Scrambling from south [1]

Mount Thiassi is a 2,772-metre (9,094-foot) mountain summit located in the Thiassi Range of the Coast Mountains, in southwestern British Columbia, Canada. It is the third-highest point in the Thiassi Range.^[3] Mount Thiassi is situated 56 km (35 mi) northwest of Pemberton, and 6.9 km (4 mi) south-southwest of Mount Vayu, which is its nearest higher peak. Precipitation runoff from the peak and meltwater from unnamed glaciers on its slopes drain into tributaries of the Lillooet, Bridge, and Hurley Rivers. The first ascent of the mountain was made in 1965 by Dick Culbert and Alice Purdey. The mountain's name was submitted by this first ascent party to commemorate Thiassi, the god of storms according to Norse mythology.^[4] The name was officially adopted June 22, 1967, by the Geographical Names Board of Canada.^[2]

Based on the Köppen climate classification, Mount Thiassi is located in a subarctic 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. Winter 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 Thiassi.

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  Thiassi Range with Mount Sampson (left), Sessel Mountain (middle), and Mount Thiassi (right). Viewed from Grouty Peak

• Geography of British Columbia
• Geology of British Columbia

• Weather forecast: Mount Thiassi
• "Mount Thiassi". BC Geographical Names.