The Del Bonita Border Crossing connects the town of Cut Bank, Montana with Del Bonita, Alberta on the Canada–US border. The crossing was established in 1939, when the highway was completed. At that time, the nearby crossing at Whiskey Gap was permanently closed. Today, there is little activity near this crossing on either side of the border, although the grass runway of the Whetstone International Airport runs along the boundary on the east side of the road. In 2012, the US replaced its border inspection station, which was built in 1962.