FULL SEASON LEAGUES
Full Season Leagues are your traditional leagues that bowl around 32-36 weeks. They normally Start in Late August - Early September and usually end in April. They are referred to as Fall or Winter Leagues.
SHORT SEASON LEAGUES
Short Season Leagues are leagues that only bowl around 8-16 weeks, half of a Full Season League. They normally Start at various times of the season. The most popular are the Summer Leagues that start in May and end in August. Others start at the end of September and end in December. There are also some that start at the half way point of the Full Season Leagues in January and end in Aprril or May. Some of these league will have gimmicks like "Have-A-Ball", or "9 Pin No Tap"
YOUTH LEAGUES
Youth Leagues are leagues for kids. After school get together's or weekend fun leagues. They normally run as a shorter season league and they start at various times throughout the year. In addition to kids only leagues, there are also Youth/Adult Leagues so the kids can bowl with parents, family friends, and relatives.