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)
Deferral access codes to register yourself for 2026 were sent by email on 12/16/25. 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.
- Only the Team Captain is required to complete payment during registration.
- During registration, the Team Captain will create a 4-digit security code for the team.
- Once registration is complete, the Team Captain will receive a unique registration link to share with their teammate. The teammate will use this link to Join a Team.
- Be sure to include your team security code when sending the registration link.
- The Team Captain is responsible for selecting the team's name and division during registration.
- Teams must be completed before November 16.
- Teams may change their team name at anytime before November 16. Only Team Captain's will have the ability to do this from their Race Roster dashboard.
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 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:
The California International Marathon and The In-Shape Family Fitness CIM Relay will NOT provide refunds to registrants for ANY reason.
Race organizers will NOT provide refunds for ANY personal conditions or circumstances that may prevent, limit, or hinder a registrant from preparing for, traveling to, or participating in CIM (including, but not limited to, injuries, illness, travel delays, family emergencies, etc.). We do NOT provide any refunds for registrants that are unable to participate. If you register and are unable to participate, for ANY reason, NO refund will be granted.
Other registration solutions, such as transfers and deferrals are dependent on the type of registration purchased. Make sure you are aware of all of the registration solution options associated with your registration type and all of the restrictions policies, and deadlines associated with those different options.
All registrants should also consider that certain event details are subject to change, and refunds will NOT be provided due to changes in the event details/amenities/services offered, including but not limited to: spectator presence, start time and procedures, event transportation, on-course services, pace teams, gear check, and pre and post race amenities and experiences.
Race organizers, in conjunction with public safety officials, reserve the right to cancel the event at any time related to ensuring the safety of participants, spectators, and the community. In the event of a race cancellation, refunds, credits, or deferrals are NOT guaranteed to participants; however, race organizers will consider the cancellation circumstances and may provide participants with some registration compensation options.
