Cross-country teams are groups of athletes who compete in long-distance running events across varied terrains, such as fields, forests, and hills. These teams typically consist of both male and female runners, often from schools or clubs, and they participate in races that can range from 5K to 10K in distance. Training for cross-country involves building endurance, speed, and teamwork, as runners often work together to achieve their best times. Races are usually held in the fall, and teams compete in local, regional, and national competitions, including championships like the NCAA Cross Country Championships.