Interstate 35 (IH-35 or I-35) is a major north–south Interstate Highway in the central United States. I-35 stretches from Laredo, Texas, on the American-Mexican border to Duluth, Minnesota, at Minnesota Highway 61 (London Road) and 26th Avenue East. Many Interstate Highways formerly had splits or spurs indicated with suffixed letters (N/S/E/W), and I-35 was the only one that still had such divisions, before the recent opening of I-69C, I-69E, and I-69W in South Texas.