Organizers
- Longview Babe Ruth
- Longview Tennis Association
- Longwood Athletic Club
- Lonnie Poole Golf Course
- Look Ahead Foundation
- Looking Glass Korean School
- Loomis Racquet Academy
- Loomis Racquet Academy @ Swarthmore College
- Loop de Loopy
- Lopez Island Chamber of Commerce
- Lorena Leopard Basketball League
- Lorena Little League
- Lorenzo Romar Basketball Camps
- Lorne Smith Lacrosse
- Lorraine's Camp Account
- Los Alamos Arts Council
- Los Alamos Youth Football and Cheerleading
- Los Altos / Los Altos Hills Little League
- Los Altos Hills
- Los Altos Youth Baseball and Softball
- Los Angeles Ballet Academy
- Los Angeles Community Titans (LACT)
- Los Angeles County Arboretum & Botanic Garden
- Los Angeles County Bicycle Coalition
- Los Angeles County Museum of Art
- Los Angeles Frontrunners
- Los Angeles Kings Hockey Club
- Los Angeles Mission College HFAC
- Los Angeles Police Department
- Los Angeles Police Department, Metropolitan Division
- Los Angeles School of Gymnastics
- Los Angeles Wheelmen Bicycle Club
- Los Gatos Cambrian Valley
- Los Gatos Tennis Academy
- Los Lagos Golf Course
- Los Ninos de Santa Fe
- Los Robles Greens
- Lost Arts Club
- Lost Cascades Bicycle Club
- Lost Creek Country Club
- Lost Forest Tennis Club
- Lost Mountain 5K
- Lost Plantation Golf Club
- Lost Tribe Expeditions
- Lost Valley
- Lotus Bud Kids
- Loudoun Arts Center
- Loudoun Golf & Country Club
- Loudoun Roadrunners
- lough gill 10km hospice swim
