The Gunflint and Lake Superior Railroad was a logging line operated by the Pigeon River Lumber Company from 1902 to 1909. It connected to the Canadian Northern Railway Duluth Extension/North Lake Subdivision (ex-Port Arthur, Duluth and Western Railway) at Milepost 79. It travelled six miles from the Ontario side of Gunflint Lake into Minnesota passing Crab and Whisker Lakes to near Topper Lake.

This video covers the northern end of the corduroy trestle and embankment as the grade then passes through a 330-foot rock cut on the ridges south of Gunflint Lake beside the Crab River and Bridal Falls. The gradient here is steep, over 10 percent, which necessitated the use of a Shay locomotive.

Active, 1902-1909.