We provide a fun and safe opportunity for recreational adult soccer in Marin. Participation is open to women of high school age (or over) and to men at least 30 years old. The MCSL plays on Saturdays with Spring and Fall season "round-robin" schedules with an end-of-season tournament and BBQ in the Spring. Most games are played at the Community Fields at Redwood High School in Larkspur, and also at Tamalpais High School in Mill Valley. There are currently twelve teams in the League.

The MCSL encourages friendly competition. No standings are kept, and there are no trophies for winning. Good Sportsmanship Awards are given to three teams each season based on voting by other teams and the number of yellow and red cards received. The primary motivation for our players is the camaraderie of the beautiful game played with a view of Mt. Tam. We play using the FIFA Laws of the Game with modifications related to substitutions, number of men and women players, safety (no slide tackles), and maintaining good relations (no dogs at the fields)