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MGS email contact

(individual districts check your own page above)


All districts will open registration November 1, 2018 for the 2019 season.  Check out district pages to see your district.  You must register for the district you live in, or where your school is located. 

Coach and Umpire Registration



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.

MGS Pitching Clinics

MGS Pitching Clinic signups will open at 9:00am on January 1st.  Sessions will be held each Sunday from January 13th to March 3rd.  Sessions can be booked up to 21 days in advance.

Separate sessions are held for beginner and intermediate/advanced players.  Please ensure you signup for your correct level of experience.

Sessions are limited to two signups for the season, unless openings exist 24 hours before the session starts.  Sessions cost $25.00.

These pitching sessions are conducted by Bill Gaito.

To sign up for the clinic that best suits your experience, click on one of the SignUp links below:

Beginner Pitching Clinic SignUp

Sign Up!

Intermediate/Advanced Pitching Clinic Signup

Sign Up!

MGS Recreation Season Age Division Overview

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


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. 

mgsrainout Marin Girls Softball mgsrainout


Marin Tremors is the competitive travel and summer ball programs of Marin Girls Softball.

Marin Tremors field 8U, 10U, 12U, & 14U travel ball teams at A/B & C  levels.  Seasons run from January through May, June through July, and September through October.  

Read all about the Marin Tremors 2019 Season by visiting our page.