2026 California International Marathon

Welcome to the 2026 California International Marathon

The full marathon is SOLD OUT, all registration options are closed.

Entry only open to special groups with ACCESS CODES.

2025 TO 2026 Deferral Code Holders (CLOSED)

• Notification: Deferral access codes to register yourself for 2026 were sent by email on 12/16/25.
• Deadline: Your deadline to register was 6/1. That option is now closed.

2026 In-Shape CIM Relay

Registration is now open! Click the yellow REGISTER button to get started.

• Team Captain: Only the Team Captain is required to complete payment during registration.
• Security Code: During registration, the Team Captain will create a 4-digit security code for the team.
• Unique Link: Once registration is complete, the Team Captain will receive a unique registration link to share with their teammate.
• Team Security Code: Be sure to include your team security code when sending the registration link.
• Team Name: The Team Captain is responsible for selecting the team's name and division during registration.
• Completion Deadline: Teams must be completed before November 16.
• Team Name Changes: Teams may change their name at any time before November 16.

Event to Event Transfers

If you are a Standard (Orange) or Premium (Gold) entry who would like to transfer to the relay, you now have the ability to do so by clicking the Transfer button and following the prompts.

Person to Person Transfers for the Full Marathon

(Opens on October 1)

Refund Policy

• Policy Statement: The California International Marathon and The In-Shape Family Fitness CIM Relay will NOT provide refunds to registrants for ANY reason.
• No Refunds: Race organizers will NOT provide refunds for ANY personal conditions or circumstances that may prevent, limit, or hinder a registrant from participating.
• Registration Solutions: Other registration solutions, such as transfers and deferrals are dependent on the type of registration purchased.
• Event Changes: All registrants should consider that certain event details are subject to change, and refunds will NOT be provided due to changes in event details.
• Cancellation Statement: Race organizers reserve the right to cancel the event at any time related to ensuring the safety of participants.

For more information, please visit the official race page.