Boulder is roughly divided in half between South Boulder Little League and North Boulder Little League. The dividing street is Arapahoe; generally, if you live north of Arapahoe, go to North Boulder Little League, and if you live south of Arapahoe, go to South Boulder Little League.

The South Boulder Little League is bounded by

• Four-mile Canyon from Peak to Peak Highway East to Colorado 119
• Colorado 119 East to Arapahoe Ave.
• Arapahoe Ave East to 95th ST.
• Inclusive of the developments of Shannon Estates, Apollo Estates, Spanish Hills, Fairview Acres, Indian Hills, Grand View, Paul-Nor Estates, Western Meadows Park, Lark Meadows, and Bari-Don Knolls.
• 95th Street to Baseline.
• Baseline West approximately 80th street equivalent.
• South along this line and along McCaslin Blvd to CO 170-Marshall Road.
• West on CO 170 to include Eldorado Springs, Walker Ranch, Juniper Heights, Miramonte, Crescent, Nederland to Peak to Peak Highway.