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Crossover Peak
Crossover Peak.jpg
Crossover Peak, northeast aspect
Highest point
Elevation 2,175 m (7,136 ft)
Prominence 185 m (607 ft)
Parent peak Slesse Mountain
Listing Mountains of British Columbia
Geography
Location British Columbia, Canada
Parent range Skagit Range
North Cascades
Topo map NTS 92H/04
Geology
Mountain type Intrusive
Volcanic arc/belt Pemberton Volcanic Belt
Climbing
Easiest route Scramble class 4

Crossover Peak is a 2,175-metre (7,136-foot) mountain summit located in the Cascade Mountains of southwestern British Columbia, Canada. It is situated 4.5 km (3 mi) north of the Canada–United States border, 1.6 km (1 mi) southeast of Mount MacFarlane, and 2 km (1 mi) north-northwest of Slesse Mountain, which is its nearest higher peak. Precipitation runoff from the peak drains into Slesse Creek and Nesakwatch Creek, both tributaries of the Chilliwack River. The mountain's name was submitted by Glenn Woodsworth of the Alpine Club of Canada based on the popular cross-over hike from the Pierce Lake trail to the Slesse trail on opposite sides of the peak. The name was officially adopted on May 21, 1981, by the Geographical Names Board of Canada.

Geology

Crossover Peak is related to the Chilliwack batholith, which intruded the region 26 to 29 million years ago after the major orogenic episodes in the region. This is part of the Pemberton Volcanic Belt, an eroded volcanic belt that formed as a result of subduction of the Farallon Plate starting 29 million years ago.

During the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured the landscape leaving deposits of rock debris. The "U"-shaped cross section of the river valleys are a result of recent glaciation. Uplift and faulting in combination with glaciation have been the dominant processes which have created the tall peaks and deep valleys of the North Cascades area.

The North Cascades features some of the most rugged topography in the Cascade Range with craggy peaks and ridges, deep glacial valleys, and granite spires. Geological events occurring many years ago created the diverse topography and drastic elevation changes over the Cascade Range leading to various climate differences which lead to vegetation variety defining the ecoregions in this area.

Climate

Crossover Peak, northwest aspect
Crossover Peak, northwest aspect

Based on the Köppen climate classification, Crossover Peak is located in the marine west coast climate zone of western North America. Most weather fronts originate in the Pacific Ocean, and travel east toward the Cascade Range 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 Cascade 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 Crossover Peak.

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