The creek is approximately 32 kilometres (20 mi) in length, flowing from the northeast, passing east of Midway, and only the final one-quarter mile (0.40 km) is in northeastern Washington, US.
In September 1860, the American and British surveyors locating the 49th parallel met from opposite directions near the creek.
However, their parallels were 270 to 370 metres (300 to 400 yd) apart, the American line proving the more accurate.
[3] Local historian Bill Barlee speculates that the headwaters of Boundary Creek is the location of Henry Morgan's lost mine.
This article related to a river in British Columbia, Canada is a stub.