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New Referee Interest Form

Sign Up for Info about how to become a referee

Recruiting Resources

For Leagues, Schools and Teams

How to Become an Official

The NCWLO provides training for all levels of girls and women's lacrosse in Northern California that use USA Lacrosse and NFHS Rules.
  • Join USA Lacrosse as a game official
  • Register with NCWLO on this site
  • Attend virtual classroom sessions
  • Attend a play day with live games
  • Purchase uniform items

Registration Now Open

Adult Registration

Junior Registration

Questions about training dates and requirements please visit our training page or email To inquire about training preparation for college level games please email

2024 Virtual Classroom and On Field Training Session Dates (Click Here)

Training information, dates and locations for junior and adult officials across all regions of Northern California.

New NCWLO Uniform Store

The NCWLO is partnering with Mother Cutter Design to provide custom uniform items for officials. The store will provide all weather jackets, pullovers, dry-fit t-shirts for youth and tournament games, lanyards and embroidered velcro patches. Store opens after Dec 25th. 

Order Jackets and Pull Overs HERE

Order Lanyards and Velcro Logo Patches - coming soon


Register for Training

Early Bird Discount Expires Dec 31st

Referee Referral Bonus

Click this form to refer a referee

NorCal Women’s Lacrosse Officials

The NorCal Women’s Lacrosse Officials, a non-profit corporation, was established in 2018.  The NCWLO replaced the NorCal Chapter of US Lacrosse Umpire Committee (established 2015) and continues the key activities of a training and assigning organization, e.g., recruit, train, observe, mentor and assign. The NCWLO services the California Interscholastic Federation (CIF), youth and adult (post collegiate) leagues, Clubs and tournaments in the regions shown below.

Click here to see who serves on the NCWLO board.

We look forward to serving all of our experienced officials from last season as well as adult and Junior officials joining us for their first season.

To inquire about officiating services for your lacrosse games please email the assignors and a member of the NCWLO will be in touch.

Email NCWLO Assignors

NCWLO provides rules training and referees to all of Northern California.

NCWLO proudly provides rules training and referees for over 400 girls lacrosse teams each year. To get referees for your lacrosse games email

Register for the FREE Coaches Rules Session

Jan 30th and 31st

2024 NFHS Rule Changes

Contact Us