<P> The end zone in American football is 10 yards long by ​ 53 ⁄ yards (160 feet) wide . Each corner is marked with a pylon . </P> <P> A full - sized end zone in Canadian football is 20 yards long by 65 yards wide . Prior to the 1980s, the Canadian end zone was 25 yards long . The first stadium to use the 20 yard long end zone was B.C. Place in Vancouver, which was completed in 1983 . The floor of B.C. Place was (and is) too short to accommodate a field 160 yards in length . The shorter end zone proved popular enough that the CFL adopted it league - wide in 1986 . At BMO Field, home to the Toronto Argonauts, the end zones are only 18 yards . (1) </P> <P> In Canadian football stadiums that also feature a running track, it is usually necessary to truncate the back corners of the end zones, since a rectangular field 150 yards long and 65 yards wide will not fit completely inside an oval - shaped running track . Such truncations are marked as straight diagonal lines, resulting in an end zone with six corners and six pylons . As of 2016, Montreal's Percival Molson Stadium is the only CFL stadium that has the rounded - off style end zones . </P> <P> During the CFL's American expansion in the mid-1990s, several stadiums, by necessity, used 15 - yard end zones (some even shorter than 15). </P>

Where are the uprights placed in the nfl