East of Burnt Flat, the Crowsnest heads through the Kootenay Pass on a stretch known as the Kootenay Skyway, or Salmo-Creston Skyway.
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The highway then proceeds to hug the Canada-U.S. border east through a stretch of switchbacks known as Anarchist Mountain, which is also the name of the upland rural community beyond the summit.
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First opened in 1964, the highway travels 14 km (9 mi) northwest along the Kootenay River, from its connection with Idaho State Highway 1 at the Rykerts Canada-U.S. border crossing to a point on the Crowsnest Highway just 1 km (about ½ mi) west of Creston.
Highway 43, the Elk Valley Highway, is the easternmost spur off of the British Columbia segment of the Crowsnest Highway, in the Regional District of East Kootenay.
It continues southeast within the park, running alongside Highway 3 before eventually meeting the Skagit River at the northern boundary of Skagit Valley Provincial Park, to the northeast of Marmot Mountain.
From the international border crossing at Roosville, the 317 km (197 mi) long Highway 93 parallels the eastern shore of Lake Koocanusa for 36 km (22 mi) to where it meets the Crowsnest Highway at Elko.