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Marin Girls Softball announces the dates for the Marin Tremors Fall Ball Team Tryouts.   To register your player for the Marin Tremors Fall Ball tryouts on Sunday August 19th, 2018 please visit: Marin Tremors Fall Ball Tryout Registration


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. 

If you subscribed to this text line in 2017, you do not need to re-subscribe. 


MGS pitching clinics have ended, please contact your individual district to inquire about their own pitching clinics. 

MGS email contact

(individual districts check your own page above)

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

Playoffs Start May 19

Click below to see the brackets.  PLEASE NOTE:   ALL INFO IS SUBJECT TO CHANGE.  seriously!  There will be changes

Congrats to the All-Star Teams!

10u: 1st place San Francisco - 2nd place Novato

12u: 1st place San Rafael - 2nd place Sonoma

15u: 1st place Novato - 2nd place Tiburon/MV


Our 2018 Marin Tremors season is underway.  This year we are fielding five Travel Ball Teams and six Marin Club Level teams.  Over 150 players are participating in the Summer Program, representing growth of over 100% in player participation from our 2017 season.

To learn more about Marin Tremors, visit

mgsrainout Marin Girls Softball mgsrainout


Coaches (home team is to enter the score): 

Log into your Sport Engine account.

Find your team page and game schedule.

Toggle the Edit Mode (left side of page) to ON.

Each game will now show QS next to it.  

Click QS, update game status (final) and input the score, hit save


(a forfeit is scored as 1-0; a weekend rainout is scored as a 1-1 tie)

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.