Fastest course in the west.


Be A Part Of It!

The California International Marathon would not be possible without the efforts of thousands of volunteers who generously donate their time, effort, and enthusiasm to help make this race a success every year! Want to help inspire over 14,000 runners in one day? Want to join your community? Looking for a fun group project? Want to be a part of CIM? VOLUNTEER!

There are 2 ways to volunteer:

As an Individual As a Group
Come meet new friends and support amazing athletes! Gather your friends, school group, co workers, church or family and volunteer together! Have 6 or more people, click here to register!