Tennis polo
The sport is played on a grass field between 80 and 100 yards long and 50 to 65 yards wide. The goal area is a semicircular line with an 11-yard radius and the penalty mark at 13 yards from the goal. An experimental rule has a second semicircular line on the field with a 17-yard radius. Generally, a field for gridiron football or soccer can be used.
Sport of athletics
A standard outdoor track is in the shape of a stadium, 400 metres in length, and has at least eight lanes 1.22 m in width (small arenas might have six lanes). Older track facilities may have nonstandard track lengths, such as 440 yards (402.3 m; 1/4 mile) (common in the United States). Historically, tracks were covered by a dirt running surface. Modern All-weather running tracks are covered by a synthetic weather-resistant running surface, which typically consists of rubber (either black SBR or colored EPDM granules), bound by polyurethane or latex resins. Older tracks may be cinder-covered.