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Tremors are now registering players interested in playing Fall Ball.  The Fall Ball program is an opportunity to play 2-3 tournaments over the September/October months, with the focus on developing players for the next season.  Typically, 8U players moving up to 10U will play on 10U teams, and 10U players moving up next year to 12U will play on 12U teams.  

Tryouts will be held Sunday August 20th and Kent Middle School.  

To register, and learn more about the program, click here.



Who Are We?

Marin Girls Softball League is a volunteer-driven recreational league for youth fast pitch softball in Central and Southern Marin County. We are a recreational program - any age-eligible child can register and all registered kids play. 

This website is the central location for all League, Travel Ball, and District news.  At this site, players, parents, family and friends can get updated information about the MGSL, our Tremors Travel Ball teams, and about local Districts. Bookmark this site and come back often and regularly to stay current with all of the news related to players, teams, schedules, standings, clinics and other relevant information. We will update this page regularly to keep all MGSL participants and interested people up to date on our softball league.

MGS Rainout text line

Send text to this number: 40404  

Type in : Follow mgsrainout

You will be a member for all MGS fields.  If a field is closed (even if it is not yours) it will be texted to you as a follower.  You need to read carefully to make sure it is your field as you are a member of the whole of MGS!  If you do not get text saying a field is closed-- assume it is open. We are only texting closures. 

Age Division Overview

Age is based on child's age on January 1 leading into Spring season.
Players 5 and 6 years old as of January 1st of the calendar year 
T-Ball and some coach pitch
Players 7 and 8 years old as of January 1st of the calendar year
Some girl pitch, some coach pitch
Players 9 and 10 years old as of January 1st of the calendar year
Girl fast pitch, some coach pitch
Players 11 and 12 years old as of January 1st of the calendar year
Girl fast pitch
Players 13 - 15 years old as of January 1st of the calendar year
Girl fast pitch

Keep a copy of the rules in your team bag! (page #s below)

15u: pp 1-5 & 6-7

12u:  pp 1-5 & 8-10

10u: pp 1-5 & 11-15

8u: pp 1-5 & 16-18

6u: pp 1-5 & 19-21

Read the rules - Know the rules.

Fastpitch Softball Tryout informational flyers

The below area is for other Fastpitch competitive softball options, outside of MGS.  Please refer to each flyer for contact information regarding each league.


    Zorana Elizondo-Walker

    Zorana Elizondo-Walker

    Executive Director of Marin Girls Softball

    Phone: 415-846-5724

    Our Sponsors

    These fine organizations make what we do possible. Please show your support to these amazing sponsors and thank them for their commitment to our organization. Interested in becoming a sponsor? Click here to learn more about our sponsorship opportunities