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. In two stretches, both through twin cities, the highway splits into
Interstate 35E—at
Dallas and at
Saint Paul, Minnesota—and
Interstate 35W—at
Fort Worth, Texas, and at
Minneapolis.