Don't run Millinocket for what you get, run Millinocket for what you give!

Help keep Millinocket running for years to come: Although there is no formal entry fee to run the Millinocket Marathon & Half, all participants are strongly encouraged to make a donation at the time of registration to support the bare minimum race expenses. These expenses include race timing, course certification, port-a-johns, bus transportation, and insurance. Anything raised above and beyond our essential race expenses will be donated to local charitable groups and organizations.

The Millinocket Marathon & Half is organized entirely by volunteers who are not compensated for their time. 100% of donations go directly to supporting race expenses and the community.

• Please don't sign up unless you are serious about traveling to Millinocket in December. We have hundreds of no-shows every year, please don't be one. After November 1st, we are actively expending funds in anticipation of your participation. If you no-show, we are still on the hook for the costs associated with your registration.
• IMPORTANT!  You must complete the online registration form and follow the prompts to the final page, where you will see your confirmation.  Additionally, you will also receive a confirmation email and your name will appear on the entrants list once you have successfully signed up.
• Sea to Summit reg process:  To sign up for the Sea to Summit Race Series you must first sign up for the Mount Desert Island Marathon/Half/Relay, and then select "Millinocket with Sea to Summit" when registering for Millinocket.  (This means that you will need to sign up for MDI and Millinocket separately.)

Special thanks to ZippyReg for sponsoring our 2026 registration platform!

Registration reached capacity on Sept. 28. There is no wait list. Space will become available as existing registrants who are not able to attend cancel their entries. Keep checking back here as spots open.

No new registrations will be accepted after Nov. 1