Ambrose–Torquay Border Crossing, Border crossing in Divide County, North Dakota, United States, and Cambria No. 6, Saskatchewan, Canada

The Ambrose-Torquay crossing connects North Dakota Highway 42 to Saskatchewan Highway 350 through rural farmland where paved roads give way to gravel in the final approach. This small border station sits in a quiet landscape with minimal infrastructure, designed to process the modest flow of local traffic crossing between the two countries.

The first customs office opened at Dupuis in 1909 and relocated to Marienthal shortly after. This crossing evolved into a modest border post serving the agricultural communities on both sides of the boundary.

The crossing's name comes from the two towns it joins: Ambrose, now largely a ghost town, and Torquay, the Saskatchewan community the Canadian post was renamed for around the 1960s. The Canadian customs office began at Dupuis in June 1909, moved to Marienthal a month later, and occupied a government building from 1912.

This crossing operates with limited hours and remains closed on some days, so planning ahead is important when heading to this remote border location. Check current hours before traveling, as seasonal changes affect both sides of the crossing.

The US border station still in use was built in 1937 and was listed on the National Register of Historic Places in 2014. On the Canadian side, the customs office began at Dupuis in June 1909, moved to Marienthal a month later, and was renamed Torquay around the 1960s.